not-very-secure.md

Not very secure ^{5 Kyu}

^{LINK TO THE KATA - REGULAR EXPRESSIONS STRINGS}

Description

In this example you have to validate if a user input string is alphanumeric. The given string is not nil/null/NULL/None, so you don't have to check that.

The string has the following conditions to be alphanumeric:

• At least one character ("" is not valid)
• Allowed characters are uppercase / lowercase latin letters and digits from 0 to 9
• No whitespaces / underscore

Solution

const alphanumeric = string => /^[a-zA-Z0-9]+$/.test(string)