Balanced brackets: Difference between revisions
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* Generate a string with <code>$N</code> opening brackets (<code>"["</code>) and <code>$N</code> closing brackets (<code>"]"</code>), in some arbitrary order. |
* Generate a string with <code>$N</code> opening brackets (<code>"["</code>) and <code>$N</code> closing brackets (<code>"]"</code>), in some arbitrary order. |
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* Determine whether the string is <em>balanced</em>; that is, whether it consists entirely of pairs of opening/closing brackets (in that order), none of which mis-nest. |
* Determine whether the string is <em>balanced</em>; that is, whether it consists entirely of pairs of opening/closing brackets (in that order), none of which mis-nest. |
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<br> |
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'''Examples''': |
'''Examples''': |
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"[[]][[[[]]]]" is balanced |
"[[]][[[[]]]]" is balanced |
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"[[]][][]]]][[" is not balanced</pre> |
"[[]][][]]]][[" is not balanced</pre> |
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=={{header|J}}== |
=={{header|J}}== |
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=={{header|Python}}== |
=={{header|Python}}== |
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<lang python>>>> def gen(N): |
<lang python>>>> def gen(N): |
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... txt = ['['] * N + [']'] * N |
... txt = ['['] * N + [']'] * N |
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"]][[][[][[[[]][[][]][[]]]]][" -> NOT OK |
"]][[][[][[[[]][[][]][[]]]]][" -> NOT OK |
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</pre> |
</pre> |
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=={{header|TUSCRIPT}}== |
=={{header|TUSCRIPT}}== |
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<lang tuscript> |
<lang tuscript>$$ MODE DATA |
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$$ MODE DATA |
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$$ SET brackets=* |
$$ SET brackets=* |
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[ |
[ |
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status=CHECK_BRACKETS (b,brackets,a1,e1,a2,e2) |
status=CHECK_BRACKETS (b,brackets,a1,e1,a2,e2) |
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PRINT b," ",status |
PRINT b," ",status |
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ENDLOOP |
ENDLOOP</lang> |
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</lang> |
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Output: |
Output: |
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<pre> |
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<pre style='height:30ex;overflow:scroll'> |
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[ ERROR |
[ ERROR |
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[] OK |
[] OK |
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