Conditional structures: Difference between revisions
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m Breaking up alternatives in AutoHotkey to headers sections. |
→Nemerle: if-else: corrected inaccurate text; formatting |
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=={{header|Nemerle}}== |
=={{header|Nemerle}}== |
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===if-else=== |
===if-else=== |
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<tt>if (cond) <then> else <this>;</tt> is an expression in Nemerle, requiring both keywords (<tt>if</tt> and <tt>else</tt>) to be valid. <tt>when</tt> and <tt>unless</tt> are macros for which <this> = null. <tt>cond</tt> must be an expression that evaluates to a bool (true|false), other types aren't automatically assigned truth or falsehood as in some languages. |
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<lang Nemerle>if (the_answer == 42) FindQuestion() else Foo(); |
<lang Nemerle>if (the_answer == 42) FindQuestion() else Foo(); |
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when (stock.price < buy_order) stock.Buy(); |
when (stock.price < buy_order) stock.Buy(); |
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unless (text < "") Write(text);</lang> |
unless (text < "") Write(text);</lang> |
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===match=== |
===match=== |
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Much cleaner than stacked if-else's, similar in some ways to switch-case (but more flexible). See [http://nemerle.org/wiki/index.php?title=Quick_Guide#Pattern_Matching here], [http://nemerle.org/wiki/index.php?title=Grok_Variants_and_matching#Matching here], or, for extra detail, [http://nemerle.org/wiki/index.php?title=Patterns_%28ref%29 the reference]. |
Much cleaner than stacked if-else's, similar in some ways to switch-case (but more flexible). See [http://nemerle.org/wiki/index.php?title=Quick_Guide#Pattern_Matching here], [http://nemerle.org/wiki/index.php?title=Grok_Variants_and_matching#Matching here], or, for extra detail, [http://nemerle.org/wiki/index.php?title=Patterns_%28ref%29 the reference]. |
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