Understanding selective assignment

Brown, James A.; Hawks, Benjamin

doi:10.1145/75145.75153

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1990

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Nonce functions

Benkard¹

1990

Conference Proceedings on APL 90: For the Future

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Data, functions, and operators exist in divers current APL systems in primitive, derived, and defmed forms. Only data primitives occur in an extended literal form, which can be quite complex. This paper introduces a form of function literal, subsequently extended to include operators. Lexical scope is restricted to the minimum to achieve perspicuousness and syntactic predictability. The short expressions which result form convenient, explicit representations of some common trivial functions. They can indirectly simulate trivial operators. !"once operators can simulate syntactic entities, which have been called transforms, that produce operators. The trade-offs between extra key strokes and symbol clutter are discussed.

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