An “IN” clause for jQuery

I wanted to use jQuery to determine if a code selected by a user (the “code” variable below) was in a static list of codes. So basically, I wanted it to act like a SQL “IN” clause. To do that, I used jQuery’s .inArray operator:

var codeList = ['1', '2', '3', '4'];
if (code.length > 0 && $.inArray(code, codeList) > -1) { ... }
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