Grade: Difference between revisions
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'''grade''' returns the [[domain]] of a collection (list, table, or dictionary) sorted by its [[range]]. It has two versions: '''up''' (<code><x</code>) and '''down''' (<code>>x</code>), a.k.a. '''asc''' and '''desc''' by analogy with SQL. |
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Grade uses a [https://en.wikipedia.org/wiki/Category:Stable_sorts stable] sorting algorithm - [[match|equivalent]] items are sorted in their original order. |
Grade uses a [https://en.wikipedia.org/wiki/Category:Stable_sorts stable] sorting algorithm - [[match|equivalent]] items are sorted in their original order. |
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Revision as of 20:53, 8 July 2022
Grade
<x
>x
>x
grade returns the domain of a collection (list, table, or dictionary) sorted by its range. It has two versions: up (<x) and down (>x), a.k.a. asc and desc by analogy with SQL.
Grade uses a stable sorting algorithm - equivalent items are sorted in their original order.
Sorting (as in sorting the range by itself) can be implemented through the idiom x@<x or x@>x. K7 and k9 support an additional dedicated sort-ascending primitive: ^x.
>34 -1 0 67 32767
4 3 0 2 1
{x(<x)}("xyz";"a";"k";"j";"apl";"bqn")
("apl"
"bqn"
"xyz"
"a"
"j"
"k")