Nodejs Number Calculate fix(n)

Method Source Code

Number.prototype.fix = function (n) {
    var val = String(this);
    n = Math.abs(n);/*  w ww  .j a  va2  s  . c  o m*/
    val = val.split('.');
    val[1] = val[1] || '';
    var m = val[1].length;
    if (m < n) {
        m = n - m;
        while (m > 0) {
            val[1] += '0';
            m--;
        }
    }
    return val[0] + ((n > 0) ? ('.' + val[1].substr(0, n)) : '');
};

Related

1. equals(another)

   Number.prototype.equals = function (another) {
       return this - another === 0;
   };
   

2. exp()

   Number.prototype.exp = function() {
     return Math.exp(this);
   };
   

3. fe(x)

   Number.prototype.fe = function(x)
     var s = x.toString();
     var point = s.search(/\./);
     if (point == -1)
       return (Math.abs(this - x) < 0.5);    
     else
   ...
   

4. fillZero(len)

   Number.prototype.fillZero = function (len)
     var s = this.toString(10);
     while (s.length<len) s = "0" + s;
     return s;
   

5. firstDigit()

   Number.prototype.firstDigit = Number.prototype.firstDigit || function () {
     let number = this;
     while (number >= 10) {
       number = Math.floor(number / 10);
     return number;
   };
   

6. fizz()

   Number.prototype.fizz = function() {
       return this % 3 === 0 ? "fizz" : "";
   };
   Number.prototype.buzz = function() {
       return this % 5 === 0 ? "buzz" : "";
   };
   for (var i = 1; i <= 15; i++) {
       var candidate = Number(i).fizz() + Number(i).buzz();
       console.log(candidate ? candidate : i);
   ...
   

7. float()

   var num = 5;
   Number.prototype.float = function(){ 
         return this.toFixed(2);
   Number.prototype.int = function(){ 
         return parseInt(this) ;
   console.log(num.float());
   console.log(num);
   ...
   

8. floatMethod()

   Number.prototype.floatMethod = function() {
       return parseFloat(this).toFixed(2);
   };
   function convert_float() {
       var n = 60.00;
      console.log(n.floatMethod());
   convert_float(n);
   

9. frac()

   Number.prototype.frac = function() {
     return this - Math.floor(this);
   };