The art of computer programming, volume 1 (3rd ed.): fundamental algorithms
The art of computer programming, volume 1 (3rd ed.): fundamental algorithms
Character string manipulation in APL
APL '74 Proceedings of the sixth international conference on APL
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This paper describes how an interactive general ledger bookkeeping system was developed by piggy-backing the application on a general-purpose APL system. Two points of special interest are emphasized: 1. Conventional accounting techniques were recast into algebraic techniques which were then applied to tree- and list-structures. 2. The underlying APL language was used to provide general-purpose binary-tree manipulating functions which were used in turn to form the journal-, ledger-, and report-generating functions. Because APL is not especially effective in performing tree-related operations, the cost of entering transaction data proved to be excessive. It is hoped that the exhibition of an important tree-based application may encourage further work in augmenting the APL language to process tree-like data structures more efficiently.