Hoe getallen opmaken?

function format(number) {
    var decimalSeparator = ".";
    var thousandSeparator = ",";
    // make sure we have a string
    var result = String(number);
    // split the number in the integer and decimals, if any
    var parts = result.split(decimalSeparator);
    // if we don't have decimals, add .00
    if (!parts[1]) {
      parts[1] = "00";
    }
    // reverse the string (1719 becomes 9171)
    result = parts[0].split("").reverse().join("");
    // add thousand separator each 3 characters, except at the end of the string
    result = result.replace(/(\d{3}(?!$))/g, "$1" + thousandSeparator);
    // reverse back the integer and replace the original integer
    parts[0] = result.split("").reverse().join("");
    // recombine integer with decimals
    return parts.join(decimalSeparator);
}
document.write("10 => " + format(10) + "<br/>");
document.write("100 => " + format(100) + "<br/>");
document.write("1000 => " + format(1000) + "<br/>");
document.write("10000 => " + format(10000) + "<br/>");
document.write("100000 => " + format(100000) + "<br/>");
document.write("100000.22 => " + format(100000.22) + "<br/>");

13

Hierdoor krijgt u uw komma-gescheiden waarden en voegen de vaste notatie aan het einde toe.

   nStr="1000";
    nStr += '';
    x = nStr.split('.');
    x1 = x[0];
    x2 = x.length > 1 ? '.' + x[1] : '';
    var rgx = /(\d+)(\d{3})/;
    while (rgx.test(x1)) {
        x1 = x1.replace(rgx, '$1' + ',' + '$2');
    }
    commaSeperated = x1 + x2 + ".00";
    alert(commaSeperated);

bron

14

function formatNumber1(number) {
  var comma = ',',
      string = Math.max(0, number).toFixed(0),
      length = string.length,
      end = /^\d{4,}$/.test(string) ? length % 3 : 0;
  return (end ? string.slice(0, end) + comma : '') + string.slice(end).replace(/(\d{3})(?=\d)/g, '$1' + comma);
 }
 function formatNumber2(number) {
  return Math.max(0, number).toFixed(0).replace(/(?=(?:\d{3})+$)(?!^)/g, ',');
 }

Bron: http://jsperf.com/number-format

Antwoord 15

Dit is ongeveer 3 keer snellere versie van het geaccepteerde antwoord. Het creëert geen array en vermijdt het maken van objecten en het samenvoegen van tekenreeksen voor hele getallen aan het einde. Dit kan handig zijn als u veel waarden weergeeft, b.v. in een tabel.

function addThousandSeparators(number) {
    var whole, fraction
    var decIndex = number.lastIndexOf('.')
    if (decIndex > 0) {
        whole = number.substr(0, decIndex)
        fraction = number.substr(decIndex)
    } else {
        whole = number
    }
    var rgx = /(\d+)(\d{3})/
    while (rgx.test(whole)) {
        whole = whole.replace(rgx, '$1' + ',' + '$2')
    }
    return fraction ? whole + fraction : whole
}

Antwoord 16

               function formatThousands(n,dp,f) {
                    // dp - decimal places
                    // f - format >> 'us', 'eu'
                    if (n == 0) {
                        if(f == 'eu') {
                            return "0," + "0".repeat(dp);   
                        }
                        return "0." + "0".repeat(dp);
                    }
                    /* round to 2 decimal places */
                    //n = Math.round( n * 100 ) / 100;
                    var s = ''+(Math.floor(n)), d = n % 1, i = s.length, r = '';
                    while ( (i -= 3) > 0 ) { r = ',' + s.substr(i, 3) + r; }
                    var a = s.substr(0, i + 3) + r + (d ? '.' + Math.round((d+1) * Math.pow(10,dp)).toString().substr(1,dp) : '');
                    /* change format from 20,000.00 to 20.000,00 */
                    if (f == 'eu') {
                        var b = a.toString().replace(".", "#");
                        b = b.replace(",", ".");
                        return b.replace("#", ",");
                    }                   
                    return a;
                }