Balanced brackets: Difference between revisions
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Starting with Julia v0.3, a foldl function is available, so that balanced may be written shortly (but not as efficiently) as follows: |
Starting with Julia v0.3, a foldl function is available, so that balanced may be written shortly (but not as efficiently) as follows: |
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<lang Julia>balanced(str) = foldl((x,y)->x<0? -1: x+y, 0, [(x=='[')-(x==']') for x=str])==0</lang> |
<lang Julia>balanced(str) = foldl((x,y)->x<0? -1: x+y, 0, [(x=='[')-(x==']') for x=str])==0</lang> |
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=={{header|L++}}== |
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<lang lisp>(include "string") |
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(defn bool balanced (std::string s) |
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(def bal 0) |
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(foreach c s |
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(if (== c |'['|) (++ bal) |
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(if (== c |']'|) (-- bal))) |
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(if (< bal 0) (return false))) |
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(return (== bal 0))) |
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(main |
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(decl std::string |tests[]| |{"", "[]", "[][]", "[[][]]", "][", "][][", "[]][[]"}|) |
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(prn std::boolalpha) |
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(foreach x tests |
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(prn x "\t" (balanced x))))</lang> |
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=={{header|Lasso}}== |
=={{header|Lasso}}== |
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