Nodejs Number Calculate step(to, add_remove_step)

Method Source Code

Number.prototype.step = function (to, add_remove_step) {
  var from = this.valueOf();
  var ch = add_remove_step.match(/[\+,\-]/g)[0];
  var i = from;//from   w  ww .ja v  a2s . c  o m
  var arr = [];

  if (ch === '+') {
    while (i <= to) {
      arr.push(i);
      i = i + parseInt(add_remove_step);
    }
  } else if (ch === '-') {
    while (i >= to) {
      arr.push(i);
      i = i + parseInt(add_remove_step);
    }
  }
  return arr;
};

Related

1. smallerThan(num)

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

2. snap(resolution)

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

3. sqrt()

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

4. square()

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

5. square()

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

6. 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){
   ...
   

7. succ()

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

8. tan()

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

9. 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){
   ...