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					58 lines
				
				1.6 KiB
			
		
		
			
		
	
	
					58 lines
				
				1.6 KiB
			| 
											3 years ago
										 | 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; |