How to delete an element in an array in js

JS method to delete an element in an array: first get the position of the specified element in the array (i.e. index index); then use the splice() function to delete the element in the array based on the index value, the syntax format is " splice(index, 1)".

The operating environment of this tutorial: Windows 7 system, ECMAScript version 5, Dell G3 computer.

First, you can define a function for the JS array object to find the position of the specified element in the array, that is, the index. The code is:

    Array.prototype.indexOf = function(val) { 
    for (var i = 0; i < this.length; i++) { 
    if (this[i] == val) return i; 
    } 
    return -1; 
    };

Then use to get the index of this element. , use the inherent function of the js array to delete this element:

    Array.prototype.remove = function(val) { 
    var index = this.indexOf(val); 
    if (index > -1) { 
    this.splice(index, 1); 
    } 
    };

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In this way, such a function is constructed. For example, I have An array:

    var emp = ['abs','dsf','sdf','fd']

If we want to delete the 'fd' in it, we can use:

    emp.remove('fd');

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