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var createWrap = require('./_createWrap'); | |
/** Used to compose bitmasks for function metadata. */ | |
var WRAP_CURRY_FLAG = 8; | |
/** | |
* Creates a function that accepts arguments of `func` and either invokes | |
* `func` returning its result, if at least `arity` number of arguments have | |
* been provided, or returns a function that accepts the remaining `func` | |
* arguments, and so on. The arity of `func` may be specified if `func.length` | |
* is not sufficient. | |
* | |
* The `_.curry.placeholder` value, which defaults to `_` in monolithic builds, | |
* may be used as a placeholder for provided arguments. | |
* | |
* **Note:** This method doesn't set the "length" property of curried functions. | |
* | |
* @static | |
* @memberOf _ | |
* @since 2.0.0 | |
* @category Function | |
* @param {Function} func The function to curry. | |
* @param {number} [arity=func.length] The arity of `func`. | |
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. | |
* @returns {Function} Returns the new curried function. | |
* @example | |
* | |
* var abc = function(a, b, c) { | |
* return [a, b, c]; | |
* }; | |
* | |
* var curried = _.curry(abc); | |
* | |
* curried(1)(2)(3); | |
* // => [1, 2, 3] | |
* | |
* curried(1, 2)(3); | |
* // => [1, 2, 3] | |
* | |
* curried(1, 2, 3); | |
* // => [1, 2, 3] | |
* | |
* // Curried with placeholders. | |
* curried(1)(_, 3)(2); | |
* // => [1, 2, 3] | |
*/ | |
function curry(func, arity, guard) { | |
arity = guard ? undefined : arity; | |
var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity); | |
result.placeholder = curry.placeholder; | |
return result; | |
} | |
// Assign default placeholders. | |
curry.placeholder = {}; | |
module.exports = curry; | |