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tsconfig"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("json 文件\n    在使用 tsc 对 ts 文件编译的时候会结合 tsconfig"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("json 配置文件进行编译\n    如果使用 tsc index"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("ts 不会经过 tsconfig"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("json 配置文件"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" 只有直接运行 tsc 才会经过 tsconfig"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("json 的配置\n    直接运行 tsc 会对根目录下的所有 ts 文件进行编译"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" 可以在 tsconfig"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("json 中写 files、include、exclude 来指定编译文件\n    可以在 "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("package")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("json 文件的 script 命令中写 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operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token 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静态类型")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("1.")]),s._v(" 一个变量是静态类型不仅意味着这个变量类型不能修改还意味着这个变量的属性和方法也确定了\n   正因为这样编辑器才会给我们更友好的提示\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 类型注解和类型推断")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("1.")]),s._v(" 类型注解就是我们来告诉 typescript 变量是什么类型 "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 需要在写代码时加上上面的基础类型或对象类型")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("2.")]),s._v(" 类型推断就是 typescript 会自动的尝试去分析变量的类型 "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 跟正常js代码一样, 鼠标移到变量上去会显示类型")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("3.")]),s._v(" 如果 typescript 能够自动分析变量类型"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" 我们就什么也不需要做\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("4.")]),s._v(" 如果 typescript 无法分析变量类型的话"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" 我们就需要使用类型注解\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("5.")]),s._v(" typescript 就是让我们所有的变量和属性都有类型"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" 如果推断不出来就自己加即类型注解\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("6.")]),s._v(" 示例"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" num1 "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("1")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 不需要加类型注解, 因为值是固定的")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" num2 "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("2")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 不需要加类型注解, 因为值是固定的")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" total "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" num1 "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("+")]),s._v(" num2 "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 不需要加类型注解")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("let")]),s._v(" num3"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 需要加")]),s._v("\n    num3 "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("3")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("function")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getTotal")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[s._v("num1"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" num2"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 需要加, 因为推断不出来参数是什么类型")]),s._v("\n      "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("return")]),s._v(" num1 "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("+")]),s._v(" num2\n    "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" total "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getTotal")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("1")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("2")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 不需要加, 因为函数里面已经推断")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" obj "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'chenj'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" age"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("23")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 不需要加, 和num1、num2一个道理, 值是固定的, 显式的赋值了")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 基础类型和对象类型")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("1.")]),s._v(" 基础类型"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" num"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("123")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 数字")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" str"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'chenj'")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 字符串")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" strOrNum"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("|")]),s._v(" number "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'chenj'")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 可以是字符串也可以是数字")]),s._v("\n    any、"),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("null")]),s._v("、"),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("undefined")]),s._v("、symbol、boolean、"),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("void")]),s._v(" 这些都属于基础类型\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("2.")]),s._v(" 对象类型"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v("\n    object 使用 "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'interface'")]),s._v(" 定义  "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 对象")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" arr"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("1")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("2")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("3")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 数组")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Person")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// class")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" chenj"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" person "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("new")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Person")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// class")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" date "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("new")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Date")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// date")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" json"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" object "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token constant"}},[s._v("JSON")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("parse")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v('"name"')]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v('"chenj"')]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 通过JSON.parse方法返回的都是any, 需要加类型注解")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token 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function"}},[s._v("getTotal2")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[s._v("str"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=>")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token function-variable function"}},[s._v("number")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[s._v("str")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=>")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" 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keyword"}},[s._v("void")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 无返回值")]),s._v("\n      console"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("log")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'hello'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("function")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("errorEmitter")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" never "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 函数无法执行到最后")]),s._v("\n      "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("throw")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("new")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Error")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n      console"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("log")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'hello'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("function")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("add1")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[s._v("num1"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" num2"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 返回值为number")]),s._v("\n      "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("return")]),s._v(" num1 "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("+")]),s._v(" num2\n    "),a("span",{pre:!0,attrs:{class:"token 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arr"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("1")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("2")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("3")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" arr"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("number "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("|")]),s._v(" string"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("1")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'2'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("3")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" arr"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" age"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'chenj'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" age"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("23")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 数组的每一项必须有 name 和 age")]),s._v("\n    type User "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" age"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// type alias 类型别名")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" arr"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" User"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'chenj'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" age"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("23")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 数组的每一项必须有 name 和 age")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Teacher")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" age"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" arr"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" Teacher"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("new")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Teacher")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'chenj'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" age"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("23")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 因为第二项里面的内容和Teacher类里面的内容一致, 所以可以, 多或少都不行")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("2.")]),s._v(" 元组"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" 要求每一项的值类型和定义的相同"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" 个数也要和定义的类型个数相同 "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// tuple")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" arr"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),s._v("string"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" string"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" number"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'chen'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'jie'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("23")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 不能多也不能少")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" arr"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),s._v("string"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" string"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" number"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'chen1'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'jie1'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("23")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'chen2'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'jie2'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("23")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token 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class-name"}},[s._v("Person")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n  readonly name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// readonly表示只读, 这个变量只能读不能改, 变量用 const 属性用 readonly")]),s._v("\n  age"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("?")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 加问号表示age这个变量可有可无, 可以传也可以不传")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),s._v("propName"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" any "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 表示除了name和age还可以传其他的变量")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("say")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 表示需要一个say函数并且返回的是string")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" age"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" boolean "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 表示函数参数是 string 和 number 返回值是 boolean")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),s._v("index"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 表示数组索引")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("interface")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Teacher")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("extends")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Person")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 继承Person中的内容, 外加自己的teach方法")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("teach")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" getPersonName "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("obj"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" Person"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token parameter"}},[a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("void")])]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=>")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 表示函数的参数内容必须是name和say和其他")]),s._v("\n  console"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("log")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("obj"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("name"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" obj "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'chenj'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" age"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("23")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("say")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("return")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'hello'")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getPersonName")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("obj"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getPersonName")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'chenj'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" age"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("23")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("say")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("return")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'hello'")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 虽然和上面的执行一致, 但是如果obj中加了一个interface中没有的变量, 这种字面量的传递方式会报错, 而上面传递变量名的方式则不会, 传递字面量ts会进行强校验")]),s._v("\n\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("User")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("implements")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Person")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token 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operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token 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operator"}},[s._v("--")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 类的定义和继承")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Person")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n  name "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'chenj'")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getName")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("return")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("this")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("name\n  "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Teacher")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("extends")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Person")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getTeacherName")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("return")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'teacherName'")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getName")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 和父类的方法重复, 重写")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("return")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("super")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getName")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("+")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("this")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("name "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 使用super调用父类的方法, 使用this.name获取父类的属性")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token 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表示只读不可修改, 在属性前面加")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// constructor 会在实例化的时候被自动执行")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Person")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("public")]),s._v(" name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string\n  "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("constructor")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[s._v("name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("this")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("name "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" name\n  "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Person")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 上面的写法可以写成这样的简写")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("constructor")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("public")]),s._v(" name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Teacher")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("extends")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Person")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 构造器继承")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("constructor")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[a("span",{pre:!0,attrs:{class:"token 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operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token 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operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// getter、setter、static")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Person")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("constructor")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("private")]),s._v(" _name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 默认前面是public")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("get")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("name")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("return")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("this")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("_name "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("+")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'chenj'")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("set")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("name")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[s._v("name"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" string")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("this")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("_name "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" name\n  "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("public")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("static")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getName")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 静态方法通过类名调用而不是实例化, 默认前面是public, 可不写")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("return")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("this")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("_name\n  "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\nconsole"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("log")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("Person"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getName")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token 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operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 抽象类, 只能被继承, 不能被实例化")]),s._v("\nabstract "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Geom")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n  width"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" number\n  "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getType")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("return")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'Geom'")]),s._v("\n  "),a("span",{pre:!0,attrs:{class:"token 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