Nodejs Array Quick Sort quick_sort()

Method Source Code

Array.prototype.quick_sort = function ()
{
    if (this.length <= 1)
        return this;

    var pivot = this[Math.round(this.length / 2)];

    return this.filter(function (x) { return x <  pivot }).quick_sort().concat(
           this.filter(function (x) { return x == pivot })).concat(
           this.filter(function (x) { return x >  pivot }).quick_sort());
}

Related

1. quickSort()

   Array.prototype.quickSort = function () {
       if (this.length <= 1) {
           return this;
       var pointIndex = Math.floor(this.length / 2);
       var pointValue = this.splice(pointIndex, 1);
       var centerValue = pointValue[0];
       var left = [];
       var right = [];
   ...
   

2. quickSort(comparator)

   Array.prototype.quickSort = function (comparator) {
     if (typeof comparator !== "function") {
       comparator = function (x, y) {
         if (x === y) {
           return 0;
         } else if (x < y) {
           return -1;
         } else {
           return 1;
   ...
   

3. quickSort(start, len)

   Array.prototype.quickSort = function(start, len) {
     if (typeof len === "undefined") {
       len = this.length;
     if (len < 2) {
       return this;
   };
   Array.prototype.swap = function (idx1, idx2) {
   ...
   

4. quick_sort()

   Array.prototype.quick_sort = function () {
       if (this.length < 2) { return this; }
       var pivot = this[Math.round(this.length / 2)];
       return this.filter(x => x <  pivot)
                  .quick_sort()
                  .concat(this.filter(x => x == pivot))
                  .concat(this.filter(x => x >  pivot).quick_sort());
   };
   

5. quick_sort()

   Array.prototype.quick_sort = function () {
       if (this.length < 2) { return this; }
       var pivot = this[Math.round(this.length / 2)];
       return this.filter(x => x < pivot)
                  .quick_sort()
                  .concat(this.filter(x => x === pivot))
                  .concat(this.filter(x => x > pivot).quick_sort());
   };
   

6. quick_sort()

   Array.prototype.quick_sort = function () {
       if (this.length < 2) { return this; }
       var pivot = this[Math.floor(Math.random() * this.length)];
       return this.filter(x => x <  pivot)
                  .quick_sort()
                  .concat(this.filter(x => x == pivot))
                  .concat(this.filter(x => x >  pivot).quick_sort());
   };
   

7. qsort(array, begin, end)

   function partition(array, begin, end, pivot)
     var piv=array[pivot];
     array.swap(pivot, end-1);
     var store=begin;
     var ix;
     for(ix=begin; ix<end-1; ++ix) {
       if(array[ix]<=piv) {
         array.swap(store, ix);
   ...
   

8. qsort(array, begin, end)

   Array.prototype.swap=function(a, b)
     var tmp=this[a];
     this[a]=this[b];
     this[b]=tmp;
   function partition(array, begin, end, pivot)
     var piv=array[pivot];
   ...
   

9. qsort(array, begin, end)

   $(function ($) {
   function dosort(form)
     var array=form.unsorted.value.split(/ +/);
     quick_sort(array);
     form.sorted.value=array.join(' ');
   function quick_sort(array)
     qsort(array, 0, array.length);
   function qsort(array, begin, end)
     if(end-1>begin) {
       var pivot=begin+Math.floor(Math.random()*(end-begin));
       pivot=partition(array, begin, end, pivot);
       qsort(array, begin, pivot);
       qsort(array, pivot+1, end);
   function partition(array, begin, end, pivot)
     var piv=array[pivot];
     array.swap(pivot, end-1);
     var store=begin;
     var ix;
     for(ix=begin; ix<end-1; ++ix) {
       if(array[ix]<=piv) {
         array.swap(store, ix);
         ++store;
     array.swap(end-1, store);
     return store;
   Array.prototype.swap=function(a, b)
     var tmp=this[a];
     this[a]=this[b];
     this[b]=tmp;
   });