Nodejs Number Calculate sqrt()

Method Source Code

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

Related

1. sigFig(precision)

   'use strict'
   Number.prototype.sigFig = function(precision){
       if( !precision ) precision = 2;
       var d = Math.pow(10, precision);
       return ( parseInt( this.valueOf() * d) / d ).toFixed(precision);
   };
   

2. simEq(number, digits)

   DEFAULT_DIGIT = 5;
   Number.prototype.simEq = function(number, digits) {
     digits = digits == undefined ? DEFAULT_DIGIT : digits;
     var n1 = this.toFixed(digits);
     var n2 = number.toFixed(digits);
     if (n1 == -0)
       n1 = 0;
     if (n2 == -0)
       n2 = 0;
   ...
   

3. sin()

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

4. smallerThan(num)

   Number.prototype.smallerThan = function(num) {
       return this < num;
   

5. snap(resolution)

   Number.prototype.snap = function(resolution) {
     return Math.floor(this / resolution) * resolution;
   };
   

6. square()

   var expect = chai.expect;
   Number.prototype.square = function () {
       "use strict";
       return this * this;
   };
   

7. square()

   Number.prototype.square = function() {
     return this * this;
   };
   

8. step(to, add_remove_step)

   Number.prototype.step = function (to, add_remove_step) {
     var from = this.valueOf();
     var ch = add_remove_step.match(/[\+,\-]/g)[0];
     var i = from;
     var arr = [];
     if (ch === '+') {
       while (i <= to) {
         arr.push(i);
         i = i + parseInt(add_remove_step);
   ...
   

9. subNum(n)

   Number.prototype.subNum = function(n){
     var f_x = parseFloat(this);
     if (isNaN(f_x)){
       return false;
     f_x = Math.floor(f_x*Math.pow(10,n)+0.0001)/Math.pow(10,n);
     var s_x = f_x.toString();
     var pos_decimal = s_x.indexOf('.');
     if (pos_decimal < 0){
   ...