js 字符串转换

// 字符串转换 1234567 > 1,234,567function formatNum(s){s = s.toString();    if (/[^0-9\.]/.test(s)){return "invalid value";}    s = s.replace(/^(\d*)$/, "$1.");    s = s.replace(/(\d*\.\d\d)\d*/, "$1");    s = s.replace(".", ",");    var re = /(\d)(\d{3},)/;    while (re.test(s)){    s = s.replace(re, "$1,$2");    }    s = s.replace(/,(\d\d)$/, ".$1");    s = s.substring(0, s.lastIndexOf(','));    return s}console.log(formatNum(1234567)) // 1,234,567// 字符串转换 1234567 > ￥1,234,567.00function formatNum(s){s = s.toString();if(/[^0-9\.]/.test(s)) return "invalid value";s=s.replace(/^(\d*)$/,"$1.");s=(s+"00").replace(/(\d*\.\d\d)\d*/,"$1");s=s.replace(".",",");var re=/(\d)(\d{3},)/;while(re.test(s)){s=s.replace(re,"$1,$2");}s=s.replace(/,(\d\d)$/,".$1");return "￥" + s.replace(/^\./,"0.");}console.log(formatNum(1234567)) // ￥1,234,567.00

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