How to determine if an element is in an array in jquery

Jquery method to determine whether an element is in an array: Use the [$.inArray] method to determine whether the specified element is in the array. The [$.inArray()] function is used to find the specified value in the array and return it. Its index value, the syntax is [$.inArray( value, array[, from].

The operating environment of this tutorial: windows7 system, jquery3.2.1 version , Dell G3 computer.

Jquery method to determine whether an element is in an array:

In jquery, you can use the $.inArray method to determine the specified element Whether it is in the array. $.inArray()The function is used to find the specified value in the array and return its index value (if not found, it returns -1).

Syntax :

$.inArray( value, array [, fromIndex ] )

Parameters:

• valueAny type of value used for lookup.

• array ArrayThe type specifies the array to be searched.

• fromIndexOptional. The Number type specifies that the search starts from the specified index position of the array, the default is 0

var arry = [ "C#", "html", "css", "JavaScript" ];
var result= $.inArray("C#", arry);

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