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{ | {| class=vertical-navbox style="float:right; font-size:500%; margin:0 1ex;" | ||
|<code>⊇</code> <code>@</code> | |||
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'''From''' (<code>⊇</code> or <code>@</code> and also called '''Select''', or, [[humour]]ously, ''Sane Indexing'') is a [[primitive function]] that selects multiple [[major cell]]s of its right argument using an array of [[index|indices]] given by its left. The primitive often offers additional functionality for a [[nested]] left argument, which varies from one language to another. It appears in [[J]] (as <source lang=j inline>{</source>), [[Extended Dyalog APL]], [[dzaima/APL]], [[KAP]], and [[BQN]] (as <code>⊏</code>). | |||
== Common usage == | == Common usage == |