Dynamic usage of APL primitive functions

This paper discusses common mistakes novices make when learning to program in APL. We present several exemplary APL “learning bugs”, describe the context in which they occur, indicate why we believe they are interesting, and speculate about underlying thinking processes. We claim that such learning bugs are worth examining: further study may yield insight into barriers to wider acceptance of APL, better understanding may lead to more effective APL teaching, and deeper analysis may hold implications for APL designers. bug...1: obs: bogey, bugbear (bugaboo): an imaginary object of fear; a source of concern 2: an insect or other creeping or crawling invertebrate... 3: an unexpected defect, fault, flaw, or imperfection 4: a disease-producing germ; also: a disease caused by it 5: a fad 6: enthusiast, hobbyist (obs: a crazy person) 7: a prominent person 8: a concealed listening device 9: a handicap (adapted from Webster's New Collegiate Dictionary, G. & C. Merriam Co., Springfield, MA, 1977)

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Execute and its use

Roden

Foster

1981

SIGAPL APL Quote Quad

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This paper examines the use of Execute in a large collection of functions found in q68 workspaces in 80 libraries of a large APL system complex.The relationship of Execute to coding style and execution efficiency such as in compiling is overviewed.A summary of previous results in static and dynamic frequency counts of the Execute token is given and the methodology and results of the study are discussed.

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Dynamic usage of APL primitive functions

Cited by 3 publications

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Program Behavior at the Symbolic Level

Program Behavior at the Symbolic Level

APL learning bugs

Execute and its use

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