Nodejs Number Calculate tan()

Method Source Code

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

Related

1. square()

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

2. square()

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

3. 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);
   ...
   

4. 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){
   ...
   

5. succ()

   Number.prototype.succ = function() {
       return this + 1;
   };
   

6. testNumber()

   function Number(){
     this.start = 20
     this.testNumber();
     this.answer = 1
   };
   Number.prototype.testNumber = function(){
     var i = 1;
     var start = this.start;
     while(i <= 20){
   ...
   

7. trim(a, b)

   Number.prototype.trim = function(a, b) {
     var min = Math.min(a, b),
         max = Math.max(a, b);
     return Math.min(Math.max(parseInt(this, 10), min), max);
   };
   

8. tween(target, position)

   Number.prototype.tween = function(target, position){
     return this + (target-this) * position;
   };
   

9. twos(n)

   Number.prototype.twos = function(n) {
     if (this >= 0) {return pad(this.toString(2),n)}
     var max = Math.pow(2,n-1);
     return "1" + pad((max + this).toString(2),n-1)
   function pad(num, size) {
       var s = "00000000000000000000" + num;
       return s.substr(s.length-size);
   Number.prototype.twos = function(n) {
     var ret = "";
     while(n)
       ret += ( (this >> --n) & (1) );
     return ret;
   };