Balanced brackets: Difference between revisions

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 This generates an infinite stream of correct balanced brackets expressions:
-<lang haskell>
+<lang haskell>brackets = filter isMatching
+           $ [1.. ] >>= (`replicateM` "[]{}") </lang>
-brackets = filter isMatching
+<pre>λ> take 10 brackets
-           $ [1.. ] >>= (`replicateM` "[]{}")
+["[]","{}","[[]]","[][]","[]{}","[{}]","{[]}","{{}}","{}[]","{}{}"]</pre>
-</lang>
 In case the index of unmatched opening bracket is need to be found, following solution is suitable.