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{{Built-in|Bind|∘}} is a [[primitive operator]]. It shares the glyph <source lang=apl inline>∘</source> with [[Beside]]. | {{Built-in|Bind|∘}} is a [[primitive operator]]. It shares the glyph [[Jot]] (<source lang=apl inline>∘</source>) with [[Beside]]; in many dialects the two operators share the name [[Compose]]. Its [[derived function]]s can only be called monadically. | ||
Called with an array left operand <source lang=apl inline>A</source> and function right operand <source lang=apl inline>g</source>, <source lang=apl inline>(A∘f) X</source> is equivalent to <source lang=apl inline>A f X</source>. | Called with an array left operand <source lang=apl inline>A</source> and function right operand <source lang=apl inline>g</source>, <source lang=apl inline>(A∘f) X</source> is equivalent to <source lang=apl inline>A f X</source>. | ||
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=== Documentation === | === Documentation === | ||
* [ | * [https://help.dyalog.com/18.0/#Language/Primitive%20Operators/Bind.htm Dyalog] | ||
{{APL built-ins}} | {{APL built-ins}}[[Category:Primitive operators]][[Category:Composition operators]] |
Revision as of 14:26, 14 July 2020
∘
|
Bind (∘
) is a primitive operator. It shares the glyph Jot (∘
) with Beside; in many dialects the two operators share the name Compose. Its derived functions can only be called monadically.
Called with an array left operand A
and function right operand g
, (A∘f) X
is equivalent to A f X
.
Called with a function left operand f
and array right operand B
, (f∘B) X
is equivalent to X f B
.
Common usage
Bind is used to create a derived function with a single constant argument, particularly in tacit programming:
Inc←+∘1 Inc 1 2 3 2 3 4
External links
Lessons
Documentation