InArray in JS checks whether a value exists in the array

Development often use this same logic, to determine whether a string or number in the array, many programming languages have such a special function, such as often used in PHP has a in_array (), but the JS incredibly wood there, wood you know?

Baidu also has a lot of ways to achieve, here to leave a kind of their own commonly used!

Attached code:

function In_array (Stringtosearch, Arraytosearch) {for

(s = 0; s < arraytosearch.length; s++) {

thi        SEntry = Arraytosearch[s].tostring ();

if (thisentry = = Stringtosearch) {return

true;

return

false;

}

Usage:

var abc=[1,2,3,4];

var z = 4;

if (In_array (Z,ABC)) {

Console.log (' Congratulations, including ' +z ');

} else{

console.log (' Sorry, not including ' +z ');

}

This article by the shadow shallow ' s Blog in July 2015, published in the front-end development category, you can comment, and retain the original address and the author of the case to refer to your website or blog