ravel

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APL a Day #6: Indices and Encoding

Previous sessions established a basic conception of indexing an array. Namely, an index encodes a reference to an element in an array according to the position of the element along each of its dimensions. Always a vector, each element of an index falls in the range [0, d) where d

apl

APL a Day #4: Arrays have elements

An array that only describes a box which may contain elements, but that does not contain any elements, does not mean much. While shapes help to clarify the APL language, when doing any work, they really only describe how to arrange the elements of an array. The monadic ravel function