By 05/02/2014 3 Comments

How to Remove elements of an array by their index in Javascript

Remove an array element(s) by value

  • We can remove array element by given an array index

splice() function

  • This function adds / removes elements from an array
  • This function effects to original array and also change it

Following code snippet will guide you for remove elements of an array by index in Javascript

<script>

function removeByIndex(arr, index) { // function with 2 parameters, first is an array, second is array index (to be removed)
arr.splice(index, 1); // splice() function called by array pass 2 parameters, first is an array index (to be removed), second is no of elements (to be deleted from an array)
}

arr= new Array(); // declare and initialize an array object
arr[0] = 'Apple'; 
arr[1] = 'Ball';
arr[2] = 'Cat';  // assign different values in array index
arr[3] = 'Dog';

alert("Array before removing elements: "+arr); // display output in an alert popup

removeByIndex(arr, 2); // call above function, pass 2 parameters, first is an array and second is array index (to be removed)

alert("Array after removing elements: "+arr);

</script>






Posted in: JavaScript

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