Dfns workspace

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dfns.dws is a workspace which is supplied together with Dyalog APL. It's is a collection of examples of programming in direct functions, which were written by multiple people since 1990s.

Late John Scholes was the editor of this workspace. He presented a talk about the contents of the workspace at Dyalog '09.[1]

Example usage

As with other workspaces, workspace dfns can be copied into the current workspace using the system function ⎕CY:

      ⎕CY'dfns'

      ⍝ Example call: timing an expression using function `cmpx`
      1 cmpx '((1e6∘|2∘×)⍣871) 1'
0.0001302490234375

Copying in only one or more specific functions is done by adding a left argument:

      'dec' 'hex'⎕CY'dfns'

      hex 1234
 04d2 
      dec '04d2'
1234

It can also be used to import the entire workspace into a utility namespace:

      {(⎕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

Referrences

  1. 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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