JavaScript array remove an element

Ads
 

JavaScript array remove an element

As in the previous section of JavaScript array tutorials we have discussed.

As in the previous section of JavaScript array tutorials we have discussed.

JavaScript array remove an element

     

As in the previous section of JavaScript array tutorials we have discussed that we can create a user defined function in JavaScript which will remove an array element by the provided index, now we will show you that how a user can remove an array element by providing the element's value.

In this example we have created a function removeByElement() which takes array object name and one array element's value which is to be removed and eliminates the specified array elements value. Here is the function definition as :

function removeByElement(arrayName,arrayElement)
 {
  for(var i=0; i<arrayName.length;i++ )
   { 
  if(arrayName[i]==arrayElement)
  arrayName.splice(i,1); 
  } 
  }

Above lines of code defines the function for removing elements according to the value and for this purpose we have used splice() method. Here is the example code:

javascript_array_remove_element.html

<html>
<head>
<title>
   JavaScript array remove element example
</title>
<script type="text/javascript">
   var arr = new Array(5);
   arr[0]="Rose";
   arr[1]="India";
   arr[2]="Technologies";
   arr[3]="Pvt";
   arr[4]="Ltd";
function removeByElement(arrayName,arrayElement)
 {
  for(var i=0; i<arrayName.length;i++ )
   { 
  if(arrayName[i]==arrayElement)
  arrayName.splice(i,1); 
  } 
  }
document.writeln("Array before calling removeByElement() method is =<b>"+arr+"</b></br>");
removeByElement(arr,"India");
document.writeln("Array after calling removeByElement() method is =<b>"+arr+"</b></br>");
</script>
</head>
<body bgcolor="#ddcdff">
<h2>
JavaScript array remove element
</h2>
</body>
</html>

After running this HTML code on the browser we will get the following output:

Download Sample Source Code

Ads

Ads