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- 02:32, 26 February 2024 Dick Lathwell (hist | edit) [3,867 bytes] Marshall (talk | contribs) (Created page with "'''Richard Henry Lathwell''' was one of the implementers of APL\360, and a designer and implementer at IBM and I.P. Sharp Associates afterwards. He is credited with the practical realization of shared variables in APL.SV, and also published the modern formula for tolerant comparison,<ref>Dick Lathwell. [https://doi.org/10.1145/800114.803685 APL comparison tolerance] at APL76 (also reproduced in [https://www.jsoftware.com/papers/satn23.htm SATN...")
- 03:34, 25 February 2024 Comparison tolerance (hist | edit) [4,430 bytes] Marshall (talk | contribs) (Created page with "'''Tolerant comparison''' is an inexact form of comparison used to mitigate the impact of floating-point rounding error on programs. It considers two numbers equal when their relative difference is smaller than a parameter called the '''comparison tolerance''', and accessed with the system variable <syntaxhighlight lang=apl inline>⎕CT</syntaxhighlight>. In addition to the comparison functions, tolerance applies to Match and Not Match, Floor, C...") originally created as "Tolerant comparison"
- 02:46, 25 February 2024 Character (hist | edit) [1,764 bytes] Marshall (talk | contribs) (Created page with ":''This page is about the data type. For the symbols used to write APL code, see Glyph.'' A '''character''' is a scalar array representing a unit of text. In current APLs this generally means a Unicode wikipedia:code point, while historically various custom character sets were used. These accomodated typical text as well as APL code, usually with one byte per character. Characters and numbers are the two basic...")
- 22:23, 23 February 2024 Number (hist | edit) [4,921 bytes] Marshall (talk | contribs) (Created page with "In APL, a number is a scalar array representing a mathematical wikipedia:number. Numbers and characters were the only possible element types in APL0 and remain the basic data types in modern APLs. In addition to quantities for computation, they are used to represent Booleans (0 and 1) and indices. Numeric operations may be subject to floating-point rounding and comparison tolerance. Traditionally, APL provides only one user-visib...")
- 16:24, 20 February 2024 EVOLUTION ERROR (hist | edit) [794 bytes] Marshall (talk | contribs) (https://tenebrax.bandcamp.com/track/evolution-error is quite good actually)