#JavaScript - remove adjacent duplicated characters

A simple replace regular expression to remove adjacent duplicated characters from a given string in js

string.replace(/(.)(?=\\1)/g, '')

For example

var string = 'aaaaaaaaaabccccccccccccccccccccdedfgh    ijjjjjjjjjjkkkkkkll'
var processed = string.replace(/(.)(?=\1)/g, '')

// processed is 'abcdedfgh ijkl'

Explanation:

• (.) : match one single character and capture it to group 1
• (?=\1) : positive look ahead, to match the results of group 1 above, and not including the group 1 in the results
• /g : interate through the whole string