29 lines
845 B
JavaScript
29 lines
845 B
JavaScript
var helperNumberAdd = require('./helperNumberAdd')
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var isFunction = require('./isFunction')
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var isArray = require('./isArray')
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var each = require('./each')
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var get = require('./get')
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/**
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* 求和函数，将数值相加
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*
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* @param {Array} array 数组
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* @param {Function/String} iterate 方法或属性
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* @param {Object} context 上下文
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* @return {Number}
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*/
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function sum (array, iterate, context) {
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var result = 0
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each(array && array.length > 2 && isArray(array) ? array.sort() : array, iterate ? isFunction(iterate) ? function () {
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result = helperNumberAdd(result, iterate.apply(context, arguments))
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} : function (val) {
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result = helperNumberAdd(result, get(val, iterate))
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} : function (val) {
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result = helperNumberAdd(result, val)
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})
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return result
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}
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module.exports = sum
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