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{{ | {{Built-in|Each|¨}} is a primitive [[monadic operator]] which applies its [[operand]] to each [[element]] of the [[arguments]], and returns an array whose elements are the results. If two arguments are given, their elements are matched using [[conformability]] rules. | ||
Each is defined only in [[Nested array model|nested]] APLs. Some [[Flat array model|flat]] APLs obtain analogous functionality by using an [[Under]] operator with [[close composition]] along with the [[Function rank|rank]]-0 function [[Disclose]] (or Unbox). In [[SHARP APL]] this is written <source lang=apl inline>f¨></source>. In [[J]] it is <source lang=apl inline>f&.></source>. | Each is defined only in [[Nested array model|nested]] APLs. Some [[Flat array model|flat]] APLs obtain analogous functionality by using an [[Under]] operator with [[close composition]] along with the [[Function rank|rank]]-0 function [[Disclose]] (or Unbox). In [[SHARP APL]] this is written <source lang=apl inline>f¨></source>. In [[J]] it is <source lang=apl inline>f&.></source>. | ||