Indices: Difference between revisions
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{{Primitive|⍸|Indices}} or '''Where''', is a [[monadic]] [[primitive function]] which returns the [[Index|indices]] of all ones in a [[boolean]] array. More generally, Indices accepts an array of non-negative integers and copies each index the corresponding number of times. | {{Primitive|⍸|Indices}} or '''Where''', is a [[monadic]] [[primitive function]] which returns the [[Index|indices]] of all ones in a [[boolean]] array. More generally, Indices accepts an array of non-negative integers and copies each index the corresponding number of times. | ||
Indices was introduced in [[J]] as < | Indices was introduced in [[J]] as <source lang=apl inline>I.</code> and is present in [[K]] as <source lang=apl inline>&</code>. | ||
== Examples == | == Examples == | ||