JavaScript Coding Challenge/Interview Question: Same Char Collapse

Published: 20 March 2020
on channel: Daily Coding Challenges

183

/*
Write a function same_char_collapse that takes in a string and
returns a collapsed version of the string. To collapse the string,
we repeatedly delete 2 adjacent characters that are the same until
there are no such adjacent characters. If there are multiple pairs
that can be collapsed, delete the leftmost pair. For example, we take
the following steps to collapse "zzzxaaxy": zzzxaaxy -- zxaaxy -- zxxy -- zy
*/

console.log(sameCharCollapse("zzzxaaxy")); // "zy" === because zzzxaaxy -- zxaaxy -- zxxy -- zy
console.log(sameCharCollapse("uqrssrqvtt")); // "uv" === because uqrssrqvtt -- uqrrqvtt -- uqqvtt -- uvtt -- uv

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