Nodejs Number Calculate reprLocale()

Method Source Code

Number.prototype.reprLocale = function () {
    var result,//from w  w  w . ja v a2  s.  com
        digits = (arguments.length > 0)? arguments[0] : undefined,
        number = String(this.repr(digits)),
        int = number.split(".")[0],
        intparts = [],
        float = (number.indexOf(".") >= 0)? number.split(".")[1] : undefined;
    while (int.length > 0) {
        if (int.length <= 3) {
            intparts.unshift(int);
            int = "";
        } else {
            intparts.unshift(int.substr(-3,3));
            int = int.substr(0, int.length-3);
        }
    }
    result = intparts.join(Locale.separator.thousand);
    if (float) {
        result += Locale.separator.digit + float;
    }
    return result;
};

Related

1. powerOf(power)

   Number.prototype.powerOf = function(power) {
     return Math.pow(this, power);
   };
   

2. randStr()

   Number.prototype.randStr = function() {
       var alpha = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
       var res = '';
       for(var i = 0; i < this; i++) {
           res += alpha[Math.floor(Math.random() * alpha.length)];
       return res;
   

3. range(a, b, i)

   Number.prototype.range  = function (a, b, i) {
       i = i || true;
       var min = Math.min.apply(Math, [a, b]),
           max = Math.max.apply(Math, [a, b]);
       return i ? this >= min && this <= max : this > min && this < max;
   };
   

4. repeat(n)

   Number.prototype.repeat = function(n){
     return this.toString().repeat(n);
   

5. repr()

   Number.prototype.repr = function () {
       var digits = (arguments.length > 0)? arguments[0] : undefined;
       if (typeof digits !== "number") {
           return Number(this);
       if (digits <= 0) {
           return Math.round(this);
       var factor = Math.pow(10, digits);
   ...
   

6. reverse()

   Number.prototype.reverse = function() {
     return parseInt(this.toString().split('').reverse().join(''), 10);
   

7. rnd2()

   Number.prototype.rnd2 = function () {
     return Math.round(this.valueOf() * 100) / 100;
   

8. rotate()

   Number.prototype.rotate = Number.prototype.rotate || function () {
     return Math.floor((this / 10) + ((this % 10) * Math.pow(10, exports.digitLength(this) - 1)));
   };
   

9. safeDivideBy(x)

   Number.prototype.safeDivideBy = function(x) {
       var result = this.valueOf() / x;
       if(result === Infinity) {
           return 0;
       else {
           return result;