Troubleshooting Regular Expressions in JavaScript

My objective is to analyze a string in order to identify the presence of lowercase letters or numbers, and then add that specific letter or number to an array.

for(let i = 0; i < datearg.length; i++) 
    {
        log.info(datearg.charAt(i));
        if(/[a-z]/.test(datearg.charAt(i))) letter_num++; letters.push(datearg.charAt(i));
        if(/[0-9]/.test(datearg.charAt(i))) number_num++; numbers.push(datearg.charAt(i));
    }

It seems like both if statements consistently return true, leading to all characters from datearg being included in the arrays. Can anyone help shed light on why this is happening?

javascriptregex

Answer №1

if(/[a-z]/.test(datearg.charAt(i))) letter_num++; letters.push(datearg.charAt(i));

The code above can be rewritten as:

if(/[a-z]/.test(datearg.charAt(i))) { letter_num++; }
letters.push(datearg.charAt(i));

Essentially, the push method is not affected by the conditional statement. This lack of braces in control structures with a single statement is often discouraged in style guides for clarity and consistency.

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