Using Regex as conditional in Javascript

Question

Hello I am having trouble trying to use Regex to check if each character in string is an alphabet.

First let me introduce the problem itself. There is a string mixed with special chars and alphabets and suppose to return the number of alphabets only.

My code/pseudo code for problem is :

//Create var to hold count;
var count = 0;
//Loop thru str
for(let char of str){
//Check if char is a alphabet 
    ***if(char === /[A-Za-z]/gi){***
    //if so add to count
    count ++;
}
//return count; 
    return count;
}

How can I use Regex in a conditional statement to check if each char is an alphabet???? Please help!

maybe regexp [`test`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/test) ? — Calvin Nunes, Feb 12 '20 at 17:32

Ben Aston · Answer 1 · 2020-02-12T19:39:46.483

1

const pattern = /[a-z]/i
const result = [...'Abc1'].reduce((count,c) => pattern.test(c) ? count+1 : count, 0)

console.log(result) // 3

edited Feb 12 '20 at 19:39

answered Feb 12 '20 at 17:59

Ben Aston

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What a slow method, creates one regexp per character. – Poul Bak Feb 12 '20 at 19:31
Good spot. Updated. – Ben Aston Feb 12 '20 at 19:41

Using Regex as conditional in Javascript

1 Answers1