javascript - 在 JavaScript 中添加逗号函数太贪心了

Question

我如何修改下面的函数，让它在我们点击小数点后停止添加逗号？

addCommas = function(number) {
    if(number === undefined) {
        return '';
    }

    while(/(\d+)(\d{3})/.test(number.toString())) {
        number = number.toString().replace(/(\d+)(\d{3})/, '$1'+','+'$2');
    }

    return number;
}

addCommas(0.123456); // Outputs 0.123,456, should output 0.123456

Answer 1

我的方法是把数字分成小数部分和整数部分...

addCommas = function(number) 
{
    if (number === undefined)
        return '';
    var parts = number.toString().split(".");
    parts[0] = parts[0].replace(/\B(?=(\d{3})+(?!\d))/g, ",");
    return parts.join(".");
}

document.write( addCommas(0.123456) + "<br />" );
document.write( addCommas(123456.123456) + "<br />" );
document.write( addCommas(123456) + "<br />" );