using Regex in an if else statement

hey guys, I created and logical statement with regex init but doesn't seem to work

let operation = Math.floor((Math.random() * name.length - 1))
    if(name[operation] === /\s$/g || name[operation] === undefined) return mathChallenge(name)

let operation = Math.floor((Math.random() * name.length - 1))
    if(name[operation] === /\s$/g || name[operation] === undefined) return mathChallenge(name)

so basically on my statement, instead of using " ", I used regex of space. I wonder if using regex is executable and if so, how should it supposed to be

2 Replies

Joao•2y ago

You can use https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/match Or build a regexp object and use one of the methods available. It's preferable if you mean to reuse the same regexp over and over: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp

13eck•2y ago

You can use regex in an if statement, but what you're doing is checking equality: is name[operation] a regex value? Unless the user is inputting a regex object it won't be true. Like Joao said, you want to see if name[operation] matches the regex you made, so use the String.match() method.

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using Regex in an if else statement