23 lines
867 B
JavaScript
23 lines
867 B
JavaScript
var baseCallback = require('./baseCallback'),
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baseReduce = require('./baseReduce'),
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isArray = require('../lang/isArray');
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/**
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* Creates a function for `_.reduce` or `_.reduceRight`.
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*
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* @private
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* @param {Function} arrayFunc The function to iterate over an array.
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* @param {Function} eachFunc The function to iterate over a collection.
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* @returns {Function} Returns the new each function.
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*/
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function createReduce(arrayFunc, eachFunc) {
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return function(collection, iteratee, accumulator, thisArg) {
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var initFromArray = arguments.length < 3;
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return (typeof iteratee == 'function' && thisArg === undefined && isArray(collection))
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? arrayFunc(collection, iteratee, accumulator, initFromArray)
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: baseReduce(collection, baseCallback(iteratee, thisArg, 4), accumulator, initFromArray, eachFunc);
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};
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}
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module.exports = createReduce;
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