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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.
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"abrcd"
</pre>{{Works in|ngn/k}}
In K2 and K3, the group primitive returns a nested array:<pre>
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Latest revision as of 07:59, 9 July 2022
Group
=x
The group primitive, denoted by =
, is used to group the indices of an array by the values they represent in the array, returning a dictionary.
=`a`a`b`c`c`d`c`a`a`k `a`b`c`d`k!(0 1 7 8;,2;3 4 6;,5;,9)
The keys from the group dictionary represent the distinct elements of the array.
="abracadabra" "abrcd"!(0 3 5 7 10;1 8;2 9;,4;,6) !="abracadabra" "abrcd" ?"abracadabra" "abrcd"
Works in: ngn/k
In K2 and K3, the group primitive returns a nested array:
="abracadabra" (0 3 5 7 10 1 8 2 9 ,4 ,6)
Works in: Kona
In order to mimic the K6 behaviour, you can use distinct: {(?x)!=x}
to get a dict.
{(?:x)!=x}`a`a`b`c .((`a 0 1 ) (`b ,2 ) (`c ,3 ))
Works in: Kona