NDLI: Carrier arrays: an idiom-preserving extension to APL

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Carrier arrays: an idiom-preserving extension to APL

Content Provider	ACM Digital Library
Author	Lowney, P. Geoffrey
Abstract	The idiomatic APL programming style is limited by the constraints of a rectangular, homogeneous array as a data structure. Non-scalar data is difficult to represent and manipulate, and the non-scalar APL functions have no uniform extension to higher rank arrays. The carrier array is an extension to APL which addresses these limitations while preserving the economical APL style. A carrier array is a ragged array with an associated partition which allows functions to be applied to subarrays in parallel. The primitive functions are given base definitions on scalars and vectors, and they are extended to higher rank arrays by uniform application mechanisms. Carrier arrays also allow the last dimensions of an array to be treated as a single datum; the primitive functions are given extended definitions on scalars and vectors of this non-scalar data.This paper defines the carrier array and gives the accompanying changes to the definitions of the APL primitive functions. Examples of programming with carrier arrays are presented, and implementation issues are discussed.
Starting Page	1
Ending Page	13
Page Count	13
File Format	PDF
ISBN	089791029X
DOI	10.1145/567532.567533
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1981-01-26
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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