8 lines
359 B
OCaml
8 lines
359 B
OCaml
fun isBalanced s = checkBrackets 0 (String.explode s)
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and checkBrackets 0 [] = true
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| checkBrackets _ [] = false
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| checkBrackets ~1 _ = false
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| checkBrackets counter (#"["::rest) = checkBrackets (counter + 1) rest
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| checkBrackets counter (#"]"::rest) = checkBrackets (counter - 1) rest
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| checkBrackets counter (_::rest) = checkBrackets counter rest
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