7f2dd5260f
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30 lines
857 B
JavaScript
30 lines
857 B
JavaScript
var createWrap = require('./_createWrap');
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/** Used to compose bitmasks for function metadata. */
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var WRAP_ARY_FLAG = 128;
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/**
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* Creates a function that invokes `func`, with up to `n` arguments,
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* ignoring any additional arguments.
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*
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* @static
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* @memberOf _
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* @since 3.0.0
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* @category Function
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* @param {Function} func The function to cap arguments for.
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* @param {number} [n=func.length] The arity cap.
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* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
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* @returns {Function} Returns the new capped function.
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* @example
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*
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* _.map(['6', '8', '10'], _.ary(parseInt, 1));
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* // => [6, 8, 10]
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*/
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function ary(func, n, guard) {
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n = guard ? undefined : n;
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n = (func && n == null) ? func.length : n;
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return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);
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}
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module.exports = ary;
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