How to find the number of occurrences of chars in a string
Recently, I came across a code challenge to find the number of occurrences of a character in a string.
It was intended to use it as a validator in order to perform some minimum char length along with the occurrences.
Anyhow, it took some time to figure out a way using Regex.
searchString// split into each characters..split('')// Sort it so that the similar chars can be grouped together..sort()// Join them to group..join('')// match the chars those have more than one occurrence..match(/(.)\1+/g)// Do what you wish with the result.// I am just counting the length here..map((a) => a.length)
Try to modify the Regex to match only a set of chars occurrences.