APL each operator ¨: shape-preserving elementwise mapping without loops
The each operator ¨ lets you apply a function to every element of an APL array while keeping the original shape, avoiding explicit loops.
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aplUsing APL’s Each Operator (¨) to Avoid Explicit Loops
Learn how APL’s each operator (¨) lets you apply a function to every array element without writing explicit loops, with a concrete matrix‑scaling example and notes on nesting and performance.
Each Operator (∘.) on Empty Arrays: Undefined Behavior?
What is the defined result of applying the each operator (∘.) to an empty array in APL, and how do different implementations handle this case?