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25 lines
745 B
25 lines
745 B
var toNumber = require('./toNumber')
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/**
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* 裁剪 Arguments 或数组 array，从 start 位置开始到 end 结束，但不包括 end 本身的位置
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* @param {Array/Arguments} array 数组或Arguments
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* @param {Number} startIndex 开始索引
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* @param {Number} endIndex 结束索引
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*/
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function slice (array, startIndex, endIndex) {
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var result = []
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var argsSize = arguments.length
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if (array) {
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startIndex = argsSize >= 2 ? toNumber(startIndex) : 0
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endIndex = argsSize >= 3 ? toNumber(endIndex) : array.length
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if (array.slice) {
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return array.slice(startIndex, endIndex)
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}
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for (; startIndex < endIndex; startIndex++) {
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result.push(array[startIndex])
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}
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}
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return result
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}
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module.exports = slice
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