Find out if a variable is in an array?

2018-06-03 22:08:33

This question already has an answer here:

How do I check if an array includes an object in JavaScript? 40 answers

jQuery has a utility function to find whether an element exist in array or not

$.inArray(value, array)

It returns index of the value in array and -1 if value is not present in array. so your code can be like this

if( $.inArray(code, countryList) != -1){
     alert('value is Array!');
} else {
    alert('Not an array');
}

You need to use Array.indexOf :

if (countryList.indexOf(code) >= 0) {
   // do stuff here
}

Please not that it is not supported in and before IE8 (and possibly other legacy browsers). Find out more about it here.

你似乎在寻找Array.indexOf函数。

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