31 lines
725 B
Java
31 lines
725 B
Java
var isFunction = require('../base/isFunction')
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var each = require('../base/each')
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var property = require('../function/property')
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/**
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* 指定方法后的返回值组成的新数组
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*
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* @param {Object} obj 对象/数组
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* @param {Function} iterate(item, index, obj) 回调
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* @param {Object} context 上下文
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* @return {Array}
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*/
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function map (obj, iterate, context) {
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var result = []
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if (obj && arguments.length > 1) {
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if (!isFunction(iterate)) {
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iterate = property(iterate)
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}
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if (obj.map) {
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return obj.map(iterate, context)
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} else {
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each(obj, function () {
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result.push(iterate.apply(context, arguments))
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})
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}
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}
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return result
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}
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module.exports = map
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