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Runtime error
Runtime error
; | |
var toPosInt = require("../number/to-pos-integer"); | |
var test = function (arg1, arg2) { return arg2; }; | |
var desc, defineProperty, generate, mixin; | |
try { | |
Object.defineProperty(test, "length", { | |
configurable: true, | |
writable: false, | |
enumerable: false, | |
value: 1 | |
}); | |
} | |
catch (ignore) {} | |
if (test.length === 1) { | |
// ES6 | |
desc = { configurable: true, writable: false, enumerable: false }; | |
defineProperty = Object.defineProperty; | |
module.exports = function (fn, length) { | |
length = toPosInt(length); | |
if (fn.length === length) return fn; | |
desc.value = length; | |
return defineProperty(fn, "length", desc); | |
}; | |
} else { | |
mixin = require("../object/mixin"); | |
generate = (function () { | |
var cache = []; | |
return function (length) { | |
var args, i = 0; | |
if (cache[length]) return cache[length]; | |
args = []; | |
while (length--) args.push("a" + (++i).toString(36)); | |
// eslint-disable-next-line no-new-func | |
return new Function( | |
"fn", | |
"return function (" + args.join(", ") + ") { return fn.apply(this, arguments); };" | |
); | |
}; | |
})(); | |
module.exports = function (src, length) { | |
var target; | |
length = toPosInt(length); | |
if (src.length === length) return src; | |
target = generate(length)(src); | |
try { mixin(target, src); } | |
catch (ignore) {} | |
return target; | |
}; | |
} | |