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→How many subsets?
Miraheze>Adám Brudzewsky |
Miraheze>Adám Brudzewsky |
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1 | 1 | ||
</source> | </source> | ||
=== Automatic mapping === | |||
A really nice feature of APL is its array-orientation. For computations which are defined on single elements, [[wikipedia:map (higher-order function)|map]]ping is implicit: | A really nice feature of APL is its array-orientation. For computations which are defined on single elements, [[wikipedia:map (higher-order function)|map]]ping is implicit: | ||
<source lang=apl> | <source lang=apl> | ||
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</source> | </source> | ||
(What's up with picking zero out of four items? Since all empty hands are equal, there is exactly one such set — the empty set.) | (What's up with picking zero out of four items? Since all empty hands are equal, there is exactly one such set — the empty set.) | ||
== Order of evaluation == | == Order of evaluation == | ||
We want to generate the indices using <source lang=apl inline>⍳</source>… | We want to generate the indices using <source lang=apl inline>⍳</source>… | ||