30 lines
857 B
JavaScript
30 lines
857 B
JavaScript
var createWrap = require('./_createWrap');
|
|
|
|
/** Used to compose bitmasks for function metadata. */
|
|
var WRAP_ARY_FLAG = 128;
|
|
|
|
/**
|
|
* Creates a function that invokes `func`, with up to `n` arguments,
|
|
* ignoring any additional arguments.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 3.0.0
|
|
* @category Function
|
|
* @param {Function} func The function to cap arguments for.
|
|
* @param {number} [n=func.length] The arity cap.
|
|
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
|
|
* @returns {Function} Returns the new capped function.
|
|
* @example
|
|
*
|
|
* _.map(['6', '8', '10'], _.ary(parseInt, 1));
|
|
* // => [6, 8, 10]
|
|
*/
|
|
function ary(func, n, guard) {
|
|
n = guard ? undefined : n;
|
|
n = (func && n == null) ? func.length : n;
|
|
return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);
|
|
}
|
|
|
|
module.exports = ary;
|