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28 lines
530 B
28 lines
530 B
/**
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* 序号列表生成函数
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*
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* @param {Number} start 起始值
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* @param {Number} stop 结束值
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* @param {Number} step 自增值
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* @return {Array}
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*/
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function range (start, stop, step) {
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var index, len
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var result = []
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var args = arguments
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if (args.length < 2) {
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stop = args[0]
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start = 0
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}
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index = start >> 0
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len = stop >> 0
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if (index < stop) {
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step = step >> 0 || 1
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for (; index < len; index += step) {
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result.push(index)
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}
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}
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return result
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}
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module.exports = range
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