Nodejs Array to Twenty Convert toTwenty()

Method Source Code

'use strict';//from  w ww  . java2  s  . co m

Array.prototype.toTwenty = function() {
   let arr = [];

   for (var i = 1; i <= 20; i++) {
      arr.push(i);
   }

   return arr;
}

Array.prototype.toForty = function() {
   let arr = [];

   for (var i = 2; i <= 40; i += 2) {
      arr.push(i);
   }

   return arr;
}

Array.prototype.toOneThousand = function() {
   let arr = [];

   for (var i = 10; i <= 1000; i += 10) {
      arr.push(i);
   }

   return arr;
}

Array.prototype.search = function(num) {
   var index = -1;
   var minIndex = 0;
   var maxIndex = this.length - 1;
   var midIndex;
   var count = 0;

   while(minIndex <= maxIndex) {
      midIndex = ~~((minIndex + maxIndex) / 2);

      if (this[minIndex] === num) {
         index = minIndex;
         break;
      } else if (this[maxIndex] === num) {
         index = maxIndex;
         break;
      } else if (this[midIndex] < num) {
         minIndex = midIndex + 1;
      } else if (this[midIndex] > num) {
         maxIndex = midIndex - 1;
      } else {
         index = midIndex;
         break;
      }

      count++;
   }

   return {"count": count, "index": index, "length": this.length};
}

Related

1. toTwenty()

   Array.prototype.toTwenty = function() {
     for (var i = 1; i < 21; i++) {
       this.push(i);
     return this;
   },
   

2. toTwenty()

   Array.prototype.toTwenty = function(){
       var start = 1;
       var end = 20;
       for(var i = start; i <= end; i += 1){
           this.push(i);
      return this;
   var oneToTwenty = [].toTwenty(); */
   ...
   

3. toTwenty()

   Array.prototype.toTwenty = function(){
       var start = 1;
       var end = 20;
       for(var i = start; i <= end; i += 1){
           this.push(i);
      return this;
   Array.prototype.toForty = function(){
   ...
   

4. toTwenty()

   Array.prototype.toTwenty = function() {
     return Array.range(20, 1);
   };
   

5. toTwenty()

   Array.prototype.toTwenty = function(){
     a = 1;
     b = [];
     for(i=1; i<=20; i++){
       b.push(i);
     return b
   

6. toTwenty()

   Array.prototype.toTwenty = function(){
     for(var loop =1; loop<=20;loop++){
       this.push(loop);
     return this;
   };
   Array.prototype.toForty = function(){
     for(var loop = 1;loop<=20;loop++){
       this.push(loop*2);
   ...
   

7. toTwenty()

   Array.prototype.toTwenty = function() {
       var arr = [];
       for (i = 0; i < 20; i++) {
           arr.push(i+1);
       return arr;
   Array.prototype.toForty = function() {
       var arr = [];
   ...
   

8. toTwenty()

   Array.prototype.toTwenty = function(){
     var twenty = [];
     for ( var i = 1; i <= 20; i++){
       twenty.push(i)
         return twenty
   Array.prototype.toForty = function() {
     var forty = [];
   ...
   

9. toTwenty()

   Array.prototype.toTwenty = function() {
     for(let i=1; i<=20; i++) {
       this.push(i);
     return this;
   Array.prototype.toForty = function() {
     for(let i=2; i<=40; i+=2) {
       this.push(i);
   ...