58 lines
1.6 KiB
JavaScript
58 lines
1.6 KiB
JavaScript
|
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;
|