JavaScript deletes the corresponding elements in an array by element index number

This article mainly introduces JavaScript through the element index number to delete the corresponding elements in the array of methods, involving JavaScript operation of the array of techniques, very practical value, the need for friends can refer to the

This article illustrates how JavaScript removes the corresponding elements in an array through the element index number. Share to everyone for your reference. The specific analysis is as follows:

JavaScript removes elements from an array by its index number, and if you want to delete the 3rd element, use Removevalbyindex (2), and the JS array starts at 0

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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 with your JavaScript programming.