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"Paragraph cleanup"
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("Paragraph cleanup") |
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{{primitive|
The '''group''' primitive, denoted by <code>=</code>, is used to group the indices of an array by the values they represent in the array, returning a dictionary.
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`a`b`c`d`k!(0 1 7 8;,2;3 4 6;,5;,9)
</pre>
The [[keys]] from the '''group''' dictionary represent the [[distinct]] elements of the array.
<pre>
="abracadabra"
"abrcd"!(0 3 5 7 10;1 8;2 9;,4;,6)
!="abracadabra"
"abrcd"
?"abracadabra"
"abrcd"
</pre>{{Works in|ngn/k}}
In K2 and K3, the group primitive returns a nested array:<pre>
="abracadabra"
(0 3 5 7 10
1 8
2 9
,4
,6)
</pre>{{Works in|Kona}}
In order to mimic the K6 behaviour, you can use [[distinct]]: <code>{(?x)!=x}</code> to get a dict.
<pre>
{(?:x)!=x}`a`a`b`c
.((`a
0 1
)
(`b
,2
)
(`c
,3
))
</pre>{{Works in|Kona}}
[[Category:Verbs]]
[[Category:Operator verbs]]
[[Category:Primitives]]
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