Dfns workspace: Difference between revisions

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== Example usage ==
== Example usage ==
As with other workspaces, workspace <source lang=text inline>dfns</source> can be copied into the current workspace using [[system command]] <source lang=apl inline>)copy</source>:
As with other workspaces, workspace <source lang=text inline>dfns</source> can be copied into the current workspace using the [[Quad name|system function]] <source lang=apl inline>⎕CY</source>:
<source lang=apl>
<source lang=apl>
       )copy dfns
       ⎕CY'dfns'


       ⍝ Example call: timing an expression using function `cmpx`
       ⍝ Example call: timing an expression using function `cmpx`
Line 12: Line 12:
0.0001302490234375
0.0001302490234375
</source>
</source>
Copying in only one or more specific functions is done by adding a left [[argument]]:
<source lang=apl>
      'dec' 'hex'⎕CY'dfns'


Alternatively, the workspace can be copied using [[Quad name|system function]] <source lang=apl inline>⎕CY</source> (copy workspace):
      hex 1234
04d2
      dec '04d2'
1234
</source>
It can also be used to import the entire workspace into a utility [[namespace]]:
<source lang=apl>
<source lang=apl>
      ⍝ Copy dfns workspace into a namespace called `dfns`
       {(⍎⍵⎕NS⍬).⎕CY ⍵}'dfns'
       {(⍎⍵⎕NS⍬).⎕CY ⍵}'dfns'



Revision as of 09:28, 25 August 2020

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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