Matching Brackets

Ringkasan Tantangan

Make sure the brackets and braces all match.

Visit the matching-brackets exercise on Exercism to read the full instructions and download the exercise files.

Community Solutions

Lihat Solusi Komunitas

The following are the top 3 community solutions by stars:

Solution 1 by @AlanDaniels101 (⭐ 12) — View on Exercism
Solution 2 by @kalev666 (⭐ 0) — View on Exercism
Solution 3 by @mawis (⭐ 2) — View on Exercism

Source: Exercism haskell/matching-brackets

💡 Lihat Solusi

module Brackets (arePaired) where

arePaired :: String -> Bool
arePaired xs = null $ foldl removeMatching [] $ filter (`elem` "({[]})") xs

removeMatching :: String -> Char -> String
removeMatching ('(' : xs) ')' = xs
removeMatching ('{' : xs) '}' = xs
removeMatching ('[' : xs) ']' = xs
removeMatching (xs) x         = x:xs