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31 lines
887 B
31 lines
887 B
5 months ago
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var round = require('./round')
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var toValueString = require('./toValueString')
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var helperStringRepeat = require('./helperStringRepeat')
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var helperNumberOffsetPoint = require('./helperNumberOffsetPoint')
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/**
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* 将数值四舍五入并格式化为固定小数位的字符串
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*
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* @param {string|number} num 数值
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* @param {number} digits 小数保留位数
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* @return {String}
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*/
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function toFixed (num, digits) {
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digits = digits >> 0
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var str = toValueString(round(num, digits))
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var nums = str.split('.')
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var intStr = nums[0]
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var floatStr = nums[1] || ''
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var digitOffsetIndex = digits - floatStr.length
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if (digits) {
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if (digitOffsetIndex > 0) {
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return intStr + '.' + floatStr + helperStringRepeat('0', digitOffsetIndex)
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}
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return intStr + helperNumberOffsetPoint(floatStr, Math.abs(digitOffsetIndex))
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}
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return intStr
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}
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module.exports = toFixed
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