Dfns workspace
dfns.dws is a workspace which is supplied together with Dyalog APL. Since the introduction of direct functions in 1996, and their inclusion in Dyalog APL version 8.1,[1] people have been contributing to the collection.
Late John Scholes was the editor of this workspace. He presented a talk about the contents of the workspace at Dyalog '09.[2]
Example usage
As with other workspaces, workspace <source lang=text inline>dfns</syntaxhighlight> can be copied into the current workspace using the system function <source lang=apl inline>⎕CY</syntaxhighlight>: <source lang=apl>
⎕CY'dfns'
⍝ Example call: timing an expression using function `cmpx`
1 cmpx '((1e6∘|2∘×)⍣871) 1'
0.0001302490234375 </syntaxhighlight> Copying in only one or more specific functions is done by adding a left argument: <source lang=apl>
'dec' 'hex'⎕CY'dfns'
hex 1234
04d2
dec '04d2'
1234 </syntaxhighlight> It can also be used to import the entire workspace into a utility namespace: <source lang=apl>
{(⍎⍵⎕NS⍬).⎕CY ⍵}'dfns'
⍝ Example call: calendar function from the new namespace
dfns.cal 2021 12
December 2021
Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 </syntaxhighlight>
Referrences
- ↑ John Scholes. Direct Functions in Dyalog APL. Dyadic Vendor Forum at APL96.
- ↑ Dyalog '09 C03: Introduction to D-Functions (dfns) (Video 1 (124 mins), Video 2 (67 mins))
External links
- dfns.dyalog.com – website generated based on the contents of this workspace.
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