System Variable RL: Difference between revisions

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(Definition for Quad RL or Random Link inserted.)
(add'l clarification wording re random seed)
 
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| Set RANDOM LINK Generator prior to using '''function '''? >> Initial Starting Value where '''?''' or Random Number Generator needs to be ''truly'' randomized - '''Not Always Needed!'''|'''⎕RL←SomeValue'''}}
| Set RANDOM LINK Generator prior to using '''function '''? >> Initial Starting Value where '''?''' or Random Number Generator needs to be ''truly'' randomized - '''Not Always Needed!'''|'''⎕RL←SomeValue'''}}
<PRE>
<PRE>
If the same random number is always generated the first time an APL workspace is loaded, then reset
Changing ⎕RL means modifying the random seed. If the same random number is ALWAYS generated thru - deal ? - the first time an APL workspace is loaded, then reset
⎕RL←# to some [long] integer value.
⎕RL←# to some [long] integer value prior to using the deal function.
         ⍝Comment - Sample initial or default APL workspace ⎕RL value:
         ⍝Comment - Sample initial or default APL workspace ⎕RL value:
         ⎕RL
         ⎕RL
1745365914586
1745365914586
</PRE>
</PRE>
If necessary, set '''⎕RL''' to some current Date-Time value converted to a long integer to help achieve true randomness ''before'' APL function '''? deal''' gets used/called.  Resetting ⎕RL '''may not''' be necessary in all APL implementations, such as NARS2000.
If necessary, set '''⎕RL''' to - some current Date-Time value converted to a Long Integer - to help achieve true randomness ''before'' APL function '''? deal''' gets used/called.  Resetting ⎕RL or ''random seed'' '''may not''' be necessary in all APL implementations, such as NARS2000.


{{System Variables}}
{{System Variables}}
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Latest revision as of 20:29, 23 January 2015

⎕RL - Random Link

Changing ⎕RL means modifying the random seed. If the same random number is ALWAYS generated thru - deal ? - the first time an APL workspace is loaded, then reset
⎕RL←# to some [long] integer value prior to using the deal function.
        ⍝Comment - Sample initial or default APL workspace ⎕RL value:
        ⎕RL
1745365914586

If necessary, set ⎕RL to - some current Date-Time value converted to a Long Integer - to help achieve true randomness before APL function ? deal gets used/called. Resetting ⎕RL or random seed may not be necessary in all APL implementations, such as NARS2000.

⎕RL←# Set RANDOM LINK Generator prior to using function ? >> Initial Starting Value where ? or Random Number Generator needs to be truly randomized - Not Always Needed!
System Variables (A value may be assigned to these except for ⎕DM)
⎕ALX ⎕CT ⎕DM ⎕DT ⎕ELX ⎕FC ⎕FEATURE ⎕FPC ⎕IC ⎕IO
⎕LR ⎕LX ⎕PP ⎕PR ⎕PW ⎕RL ⎕SA ⎕WSID
Niladic System Functions (a value cannot be assigned to these)
⎕A ⎕AV ⎕EM ⎕ET ⎕LC ⎕NNAMES ⎕NNUMS ⎕SI ⎕SYSID ⎕SYSVER
⎕T ⎕TC ⎕TCBEL ⎕TCBS ⎕TCESC ⎕TCFF ⎕TCHT ⎕TCLF ⎕TCNL ⎕TCNUL
⎕TS ⎕WA
Monadic or dyadic system functions (a value cannot be assigned to these)
⎕AT ⎕CR ⎕DC ⎕DFT ⎕DL ⎕DR ⎕EA ⎕EC ⎕ERROR ⎕ES
⎕EX ⎕FMT ⎕FX ⎕MF ⎕NAPPEND ⎕NC ⎕NCREATE ⎕NERASE ⎕NINFO ⎕NL
⎕NLOCK ⎕NREAD ⎕NRENAME ⎕NREPLACE ⎕NRESIZE ⎕NSIZE ⎕NTIE ⎕NUNTIE ⎕STOP ⎕TF
⎕TRACE ⎕UCS ⎕VR
Note that quad functions and variables (except for the ⎕A family of functions) are case insensitive


See Also
System Commands System Variables and Functions Operators


Keyboard
Alt+Shift ⍪ ≡ ≢ ⍒ ⍋ ⌽ ⍉ ⊖ ⍟ ⍱ ⍲ ⍠ ⌹
Alt ⋄ ¨ ¯ < ≤ ∅ ≥ > ≠ ∨ ∧ × ÷
Shift ~ ! @ # $ % ^ & * ( ) _ +
Key ` 1 2 3 4 5 6 7 8 9 0 - =
Alt+Shift ⍷ √ ⍨ ⍸ ⍥ ⍣ ⍞ ⍬ ⊣
Alt ? ⍵ ∊ ⍴ § ↑ ↓ ⍳ ○ π ← → ⊢
Shift Q W E R T Y U I O P { } |
Key q w e r t y u i o p [ ] \
Alt+Shift ∫ ∂ ⌻ ⍢ ⍙ ⍤ ⍫ ⌷
Alt ⍺ ⌈ ⌊ ∞ ∇ ∆ ∘ ‼ ⎕ ⍎ ⍕
Shift A S D F G H J K L : "
Key a s d f g h j k l ; '
Alt+Shift ⊆ ⊇ χ ⍡ ⍭ ⊙
Alt ⊂ ⊃ ∩ ∪ ⊥ ⊤ ⍦ ⍝ ⍀ ⌿
Shift Z X C V B N M < > ?
Key z x c v b n m , . /
NARS 2000 Lang
Tool
Bar 		← → + - × ÷ * ⍟ ⌹ ○ ! ? √ | ⌈ ⌊ ⊥ ⊤ ⊣ ⊢
≡ ≢ < ≤ = ≥ > ≠ ∨ ∧ ⍱ ⍲ ↑ ↓ ⊂ ⊃ ⌷ ⍋ ⍒
⍳ ∊ ⍸ ⍷ ∪ ∩ ⊆ ⊇ ~ § π .. , ⍪ ⍴ ⌽ ⊖ ⍉
/ \ ⌿ ⍀ ⊙ ¨ ⍨ ⍤ ⍣ ⍡ ⍥ ⍦ . ∘ ⍠ ‼ ⌻ ∂ ∫ ⍞ ⎕ ⍎ ⍕
⋄ ⍝ ∇ ∆ ⍙ _ ⍺ ⍵ ¯ ⍬ ∞ ∅
Second Row i j k i j k l g p r v x

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