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Sorting Javascript Array using the QuickSort Algorithm

Posted on 2009-04-01
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Last Modified: 2012-05-06
I have the following javascript code which sorts <tr> elements within a <tbody> container.
As I have a large number of <tr> elements to sort, I am wondering if the quick sort method would be appopriate, if anyone can translate the code I have.
The wikipedia reference to Quicksort is here http://en.wikipedia.org/wiki/Quicksort

var trTagsArray = new Array();
 
function initTBody(tdBodyID){
  var tbodytag = document.getElementById(tdBodyID);
  var tbodytagChilds = tbodytag.childNodes
  var i = 0;
  for (i=0;i<tbodytagChilds.length;i++){
    if (tbodytagChilds[i].nodeName == "TR"){
      trTagsArray.push(tbodytagChilds[i]);
    }
  }
}
 
function reOrder(tbodyid,o1,o2,o3){
  var tbodytag = document.getElementById(tbodyid);
  var tbodytagChilds = tbodytag.childNodes;
  var splicedTrTag;
  var oValue;
  var i = 0;
  var smallestSortValue = "ZZZZZZZZZZ";
  var smallestIndex;
  var tempArray = new Array().concat(trTagsArray);
  var tempArray2 = new Array();
  var sortValue="";
  while (tbodytagChilds.length > 0){
    tbodytag.removeChild(tbodytagChilds[0]);
  }
    for (var k=3;k>=1;k--){
    oValue = eval("o" + k);
    while (tempArray.length > 0){
      smallestSortValue = "ZZZZZZZZZZ";
      for (i=0;i<tempArray.length;i++){
        sortValue = getSortValue(tempArray[i],oValue);
        if (sortValue < smallestSortValue){
          smallestSortValue = sortValue;
          smallestIndex = i;
        }
      }
      splicedTrTag = tempArray[smallestIndex];
      tbodytag.appendChild(splicedTrTag);
      tempArray.splice(smallestIndex,1);
      tempArray2.push(splicedTrTag);
    }  
    
    tempArray = new Array().concat(tempArray2);
    tempArray2 = new Array();
  }
 
}
 
function getSortValue(trTag,tagIndex){
  var trTagChilds = trTag.childNodes;
  var indexedTdTag;
  var numTdTag = 0;
  var j=0;
  var returnValue = "";
  for (j=0;j<trTagChilds.length;j++){
    if (trTagChilds[j].nodeName == "TD"){
      ++numTdTag;
      if (tagIndex == numTdTag){
        indexedTdTag = trTagChilds[j];
        break;
      }
    }
  }
  
  try{
    returnValue = indexedTdTag.attributes['sortvalue'].value;
  }catch(err){
    returnValue = "";
  }
  
  return returnValue;
}

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Question by:mildurait
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7 Comments
 
LVL 15

Expert Comment

by:fsze88
ID: 24041653
mildurait,
I have tried to solve it out...
But... I facing several problems
1) pass arrays to the function Quicksort Recursively
2) threading problem, I can't wait until first job was finished then fire another one ....
Sorry, I am not Jesus !

<table>
     <tr>
          <td onclick="reOrder('myTBody',1,0,0);">ID</td>
          <td onclick="reOrder('myTBody',2,3,1);">Name</td>
          <td onclick="reOrder('myTBody',3,2,1);">DOB</td></tr>
     </tr>
     <tbody id="myTBody">
         <tr ordernum=1>
            <td sortvalue="0000001">1</td>
            <td sortvalue="Peter">Peter</td>
            <td sortvalue="19750119">19/01/1975</td>
          </tr>
            <tr ordernum=3>
                <td sortvalue="0000004">4</td>
                <td sortvalue="Jane">Jane</td>
                <td sortvalue="19800201">01/02/1980</td>
            </tr>
           <tr ordernum=2>
              <td sortvalue="0000002">2</td>
              <td sortvalue="Mark">Mark</td>
              <td sortvalue="19880731">31/07/1988</td>
           </tr>
            <tr ordernum=3>
                <td sortvalue="0000003">3</td>
                <td sortvalue="Jane">Jane</td>
                <td sortvalue="19600201">01/02/1960</td>
            </tr>
           <tr ordernum=4>
              <td sortvalue="0000002">2</td>
              <td sortvalue="Mark">Mark</td>
              <td sortvalue="19890731">31/07/1989</td>
           </tr>
            <tr ordernum=5>
                <td sortvalue="0000003">3</td>
                <td sortvalue="Jane">Jane</td>
                <td sortvalue="20000201">01/02/2000</td>
            </tr>
     </tbody>
</table>
 
<script type="text/javascript">
var trTagsArray = new Array();
 
function initTBody(){
  var tbodytag = document.getElementById("myTBody");
  var tbodytagChilds = tbodytag.childNodes
  var i = 0;
  for (i=0;i<tbodytagChilds.length;i++){
    if (tbodytagChilds[i].nodeName == "TR"){
      trTagsArray.push(tbodytagChilds[i]);
    }
  }
}
 
 
function reOrder(tbodyid,o1,o2,o3){
  var tbodytag = document.getElementById(tbodyid);
  var tbodytagChilds = tbodytag.childNodes;
  var splicedTrTag;
  var oValue;
  var i = 0;
  var smallestSortValue = "ZZZZZZZZZZ";
  var smallestIndex;
  var tempArray = new Array().concat(trTagsArray);
  var tempArray2 = new Array();
  var sortValue="";
  while (tbodytagChilds.length > 0){
    tbodytag.removeChild(tbodytagChilds[0]);
  }
 
 
  for (var k=3;k>=1;k--){
    oValue = eval("o" + k);
//    alert("oValue : " + oValue);
    tempArray = Quicksort(tempArray,oValue);
  }
 
 
//  tempArray = Quicksort(tempArray,3);
 
    for (i = 0; i< tempArray.length;i++){
        tbodytag.appendChild(tempArray[i]);
    }
}
 
function Quicksort(sortArray,voValue){
 
      var tempArray = new Array().concat(sortArray);
      var lessArray = new Array();
      var moreArray = new Array();
      var resultArray = new Array();
      var sortValue="";
 
      if (sortArray.length == 1){
        return sortArray[0];
      }else{
 
      pivot = tempArray.pop();
      pivotValue = getSortValue(pivot, voValue);
 
      for (i=0;i<tempArray.length;i++){
        if (voValue ==3){
          sortValue = parseInt(getSortValue(tempArray[i],voValue));
        }else{
                sortValue = getSortValue(tempArray[i],voValue);
        }
        if (sortValue <= pivotValue){
          lessArray.push(tempArray[i]);
        }else{
          moreArray.push(tempArray[i]);
        }
      }
 
      
      
      if (lessArray.length > 0){
        resultArray = resultArray.concat(Quicksort(new Array(lessArray),voValue));
      }
 
      resultArray = resultArray.concat(pivot);
 
 
      if (moreArray.length > 0){
        resultArray = resultArray.concat(Quicksort(new Array(moreArray),voValue));
      }
 
      return resultArray;
      }
 
}
 
function getSortValue(trTag,tagIndex){
  var trTagChilds = trTag.childNodes;
  var indexedTdTag;
  var numTdTag = 0;
  var j=0;
  var returnValue = "";
  for (j=0;j<trTagChilds.length;j++){
    if (trTagChilds[j].nodeName == "TD"){
      ++numTdTag;
      if (tagIndex == numTdTag){
        indexedTdTag = trTagChilds[j];
        break;
      }
    }
  }
  
  try{
    returnValue = indexedTdTag.attributes['sortvalue'].value;
  }catch(err){
    returnValue = "";
  }
  
  return returnValue;
}
 
initTBody();
</script>

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LVL 11

Author Comment

by:mildurait
ID: 24044452
@fsze88
So if I hear you right
a) this is a burden which is way too heavy and impossible for you to carry alone?
b) only Jesus, the living Son of God, who has the authority over all Heaven and Earth would have the ability to solve the insolvable?
0
 
LVL 15

Expert Comment

by:fsze88
ID: 24046005
mildurait,
I will keep try to solve this.... give me times. Also, I interested in this question but not guarantee I can/able to solve it out....
0
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LVL 11

Author Comment

by:mildurait
ID: 24046023
@fsze88
You've done great things for me so far, and I appreciate your help.
We might need to develop a replacement language for JavaScript, called JesusScript which would by definition support an unlimited number of concurrent recursive calls.
0
 
LVL 15

Accepted Solution

by:
fsze88 earned 2000 total points
ID: 24046474
please try this,
note : this is not responsible for error and/or guarantee faster than bubble sort
have a fun....
<table>
     <tr>
          <td onclick="reOrder('myTBody',1,0,0);">ID</td>
          <td onclick="reOrder('myTBody',2,3,1);">Name</td>
          <td onclick="reOrder('myTBody',3,2,1);">DOB</td></tr>
     </tr>
     <tbody id="myTBody">
         <tr ordernum=1>
            <td sortvalue="0000001">1</td>
            <td sortvalue="Peter">Peter</td>
            <td sortvalue="19750119">19/01/1975</td>
          </tr>
            <tr ordernum=3>
                <td sortvalue="0000004">4</td>
                <td sortvalue="Jane">Jane</td>
                <td sortvalue="19760201">01/02/1976</td>
            </tr>
           <tr ordernum=2>
              <td sortvalue="0000002">2</td>
              <td sortvalue="Mark">Mark</td>
              <td sortvalue="19880731">31/07/1988</td>
           </tr>
            <tr ordernum=3>
                <td sortvalue="0000003">3</td>
                <td sortvalue="Jane">Jane</td>
                <td sortvalue="19600201">01/02/1960</td>
            </tr>
           <tr ordernum=4>
              <td sortvalue="0000006">6</td>
              <td sortvalue="Mark">Mark</td>
              <td sortvalue="19990731">31/07/1999</td>
           </tr>
            <tr ordernum=5>
                <td sortvalue="0000005">5</td>
                <td sortvalue="Jane">Jane</td>
                <td sortvalue="19610201">01/02/1961</td>
            </tr>
     </tbody>
</table>
 
<script type="text/javascript">
var trTagsArray = new Array();
 
function initTBody(){
  var tbodytag = document.getElementById("myTBody");
  var tbodytagChilds = tbodytag.childNodes
  var i = 0;
  for (i=0;i<tbodytagChilds.length;i++){
    if (tbodytagChilds[i].nodeName == "TR"){
      trTagsArray.push(tbodytagChilds[i]);
    }
  }
}
 
 
function reOrder(tbodyid,o1,o2,o3){
  var tbodytag = document.getElementById(tbodyid);
  var tbodytagChilds = tbodytag.childNodes;
  var splicedTrTag;
  var oValue;
  var i = 0;
  var smallestSortValue = "ZZZZZZZZZZ";
  var smallestIndex;
  var tempArray = new Array().concat(trTagsArray);
  var tempArray2 = new Array();
  var sortValue="";
  while (tbodytagChilds.length > 0){
    tbodytag.removeChild(tbodytagChilds[0]);
  }
 
  for (var k=3;k>=1;k--){
    oValue = eval("o" + k);
    tempArray = Quicksort(tempArray,oValue);
  }
 
////      tempArray = Quicksort(new Array().concat(tempArray),3);
////      alert("final tempArray.length : " + tempArray.length);
 
/*
  try{
      for (i=0;i<tempArray.length;i++){
        document.write("result : " + getSortValue(tempArray[i],1) + "<br/>");
      }
  }catch(err){
    document.write('abc');
  }
*/  
 
 
    for (i = 0; i< tempArray.length;i++){
        tbodytag.appendChild(tempArray[i]);
    }
 
}
 
function Quicksort(sortArray,voValue){
 
      var resultArray = new Array();
 
      var tempArray = new Array().concat(sortArray);
 
      var lessArray = new Array();
      var moreArray = new Array();
      var pivot;
      var pivotValue;
      var sortValue="";
      
//      var element = sortArray[0];
      
//      alert("element : " + element + "<br/>");
//      alert("tempArray[0].nodeName : " + tempArray[0].nodeName + "<br/>");
 
      
      if (sortArray.length == 1){
        return sortArray[0];
      }else{
      
        pivot = tempArray.pop();
        pivotValue = getSortValue(pivot, voValue);
  
        for (i=0;i<tempArray.length;i++){
          sortValue = getSortValue(tempArray[i],voValue);
////          alert("pivotValue : " + pivotValue + " sortValue : " + sortValue + "<br/>");
          if (sortValue <= pivotValue){
            lessArray.push(tempArray[i]);
          }else{
            moreArray.push(tempArray[i]);
          }
        }
 
/*
        for (i=0;i<lessArray.length;i++){
          document.write("left : " + getSortValue(lessArray[i],voValue) + "<br/>");
        }
*/        
        if (lessArray.length > 0){
          resultArray = new Array().concat( resultArray.concat(Quicksort( new Array().concat(lessArray) , voValue) ) );
        }
  
////        alert("pivotValue : " + pivotValue);
        resultArray = new Array().concat(resultArray.concat(pivot));
        
/*  
        for (i=0;i<moreArray.length;i++){
          document.write("right : " + getSortValue(moreArray[i],voValue) + "<br/>");
        }
  */
        
        if (moreArray.length > 0){
          resultArray = resultArray.concat(Quicksort(new Array().concat(moreArray) , voValue));
        }
        return resultArray;
      }
 
}
 
function getSortValue(trTag,tagIndex){
  var trTagChilds = trTag.childNodes;
  var indexedTdTag;
  var numTdTag = 0;
  var j=0;
  var returnValue = "";
  for (j=0;j<trTagChilds.length;j++){
    if (trTagChilds[j].nodeName == "TD"){
      ++numTdTag;
      if (tagIndex == numTdTag){
        indexedTdTag = trTagChilds[j];
        break;
      }
    }
  }
  
  try{
    returnValue = indexedTdTag.attributes['sortvalue'].value;
  }catch(err){
    returnValue = "";
  }
  
  return returnValue;
}
 
initTBody();
</script>

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LVL 15

Expert Comment

by:fsze88
ID: 24059156
did you tried it? It works on QuickSort Algorithm
0
 
LVL 11

Author Closing Comment

by:mildurait
ID: 31565278
Well done again!
Thanks for your time and expertise.
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