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...wever, there have also been several significant languages that retain core APL ideas while breaking compatibility, including [[Ken Iverson|Iverson]]'s own APL dialects that emphasize backward compatibility typically apply greater caut

...d as a major (.0) or minor (point) release, depending on whether the major version number is incremented. Major versions are more likely to introduce new feat For information about versions prior to 10.0, see [[Dyalog APL#Versions]].

...Dictionary of APL]] defines Iota to have [[function rank]] 0, and [[SHARP APL]] gives it rank 1 but requires each row (1-[[cell]]) of the argument to hav ...ng=apl inline>⍳n</syntaxhighlight> returns the first <syntaxhighlight lang=apl inline>n</syntaxhighlight> [[index|indices]] in order:

...argument length match the right argument rank, and was extended in [[SHARP APL]] 19.0 to allow short left arguments. It is closely related to [[Drop]], wh <syntaxhighlight lang=apl>

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