Higher-order functions: Difference between revisions
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This example is taken from V. |
This example is taken from V. |
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Define first as multiplying two numbers on the stack. |
Define first as multiplying two numbers on the stack. |
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<syntaxhighlight lang=Joy>DEFINE first == *.</syntaxhighlight> |
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There will be a warning about overwriting builtin first. |
There will be a warning about overwriting builtin first. |
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Define second as interpreting the passed quotation on the stack. |
Define second as interpreting the passed quotation on the stack. |
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<syntaxhighlight lang=Joy>DEFINE second == i.</syntaxhighlight> |
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Pass first enclosed in quotes to second |
Pass first enclosed in quotes to second. |
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<syntaxhighlight lang=Joy>2 3 [first] second.</syntaxhighlight> |
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The program prints 6. |
The program prints 6. |
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