How to delete elements in an array using the element index number in JavaScript _ javascript tips-js tutorial

This article mainly introduces how to use JavaScript to delete the corresponding elements in an array through the element index number. It involves the javascript array operation technique and is very useful, for more information about how to delete elements in an array by using the element index number in JavaScript, see the following example. Share it with you for your reference. The specific analysis is as follows:

JavaScript deletes the elements in the array using the index number of the element. to delete the first element, use RemoveValByIndex (2). The JS array starts from 0.

Function RemoveValByIndex (arr, index) {arr. splice (index, 1) ;}test = new Array (); test [0] = 'apple'; test [1] = 'ball '; test [2] = 'cat'; test [3] = 'Dog'; alert ("Array before removing elements:" + test); RemoveValByIndex (test, 2 ); alert ("Array after removing elements:" + test );

I hope this article will help you design javascript programs.