December 1982 - Vol. 25 No. 12
Features
Software engineering for the Cobol environment
In a attempt to improve the productivity of their 70 development staff, Skandinaviska Enskilda Banken has built an integrated set of manual and automatic tools for the…
On the emulation of flowcharts by decision tables
Any flowchart can be emulated by a decision table, whose complexity depends on that of the flowchart. It may be necessary, however, to introduce a new control variable…
An effective way to represent quadtrees
A quadtree may be represented without pointers by encoding each black node with a quaternary integer whose digits reflect successive quadrant subdivisions. We refer to…
Implementations for coalesced hashing
The coalesced hashing method is one of the faster searching methods known today. This paper is a practical study of coalesced hashing for use by those who intend to…
A critique of the foundations of Hoare style programming logics
Much recent discussion in computing journals has been devoted to arguments about the feasibility and usefulness of formal verification methods. Too little attention has…
A hash code method for detecting and correcting spelling errors
The most common spelling errors are one extra letter, one missing letter, one wrong letter, or the transposition of two letters. Deletion, exchange, and rotation…
A comment on English neologisms and programming language keywords
The choice of keywords in the design of programming languages is compared to the formation of neologisms, or new words, in natural languages. Examination of keywords in…
