4,493
edits
Defined function (traditional): Difference between revisions
Jump to navigation
Jump to search
m
Defined function (traditional) (view source)
Revision as of 12:06, 14 July 2020
, 12:06, 14 July 2020→Dyalog APL extensions
| Line 41: | Line 41: | ||
=== Dyalog APL extensions === | === Dyalog APL extensions === | ||
In addition to the two above-mentioned extensions for localising names, Dyalog APL adds a few features to tradfn.<ref>[[Dyalog Ltd.]] Programming Reference Guide. [https://help.dyalog.com/latest/#Language/Defined%20Functions%20and%20Operators/Model%20Syntax.htm Model Syntax].</ref> | In addition to the two above-mentioned extensions for localising names, [[Dyalog APL]] adds a few features to tradfn.<ref>[[Dyalog Ltd.]] Programming Reference Guide. [https://help.dyalog.com/latest/#Language/Defined%20Functions%20and%20Operators/Model%20Syntax.htm Model Syntax].</ref> | ||
The the header syntax can explicitly specify that a function is [[ambivalent]] by enclosing the left argument name in curly braces (for example <source lang=apl inline>result←{left} Function right</source>). Others dialects treat all functions that declare a left argument name as ambivalent and leave it up to the programmer to check for the presence of a value. | The the header syntax can explicitly specify that a function is [[ambivalent]] by enclosing the left argument name in curly braces (for example <source lang=apl inline>result←{left} Function right</source>). Others dialects treat all functions that declare a left argument name as ambivalent and leave it up to the programmer to check for the presence of a value. | ||