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37 lines
1.0 KiB
37 lines
1.0 KiB
var baseRest = require('./_baseRest'), |
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isIterateeCall = require('./_isIterateeCall'); |
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/** |
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* Creates a function like `_.assign`. |
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* |
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* @private |
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* @param {Function} assigner The function to assign values. |
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* @returns {Function} Returns the new assigner function. |
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*/ |
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function createAssigner(assigner) { |
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return baseRest(function(object, sources) { |
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var index = -1, |
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length = sources.length, |
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customizer = length > 1 ? sources[length - 1] : undefined, |
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guard = length > 2 ? sources[2] : undefined; |
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customizer = (assigner.length > 3 && typeof customizer == 'function') |
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? (length--, customizer) |
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: undefined; |
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if (guard && isIterateeCall(sources[0], sources[1], guard)) { |
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customizer = length < 3 ? undefined : customizer; |
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length = 1; |
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} |
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object = Object(object); |
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while (++index < length) { |
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var source = sources[index]; |
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if (source) { |
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assigner(object, source, index, customizer); |
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} |
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} |
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return object; |
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}); |
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} |
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module.exports = createAssigner;
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