System Function AV: Difference between revisions
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<h1><apl>{quad}AV</apl> - Atomic Vector</h1> | <h1><apl>{quad}AV</apl> - Atomic Vector</h1> | ||
<apll>{quad}AV</apll> is an ISO 13751 standard niladic system function which returns the entire character set. | <apll>{quad}AV</apll> is an ISO 13751 standard niladic system function which returns the entire character set. | ||
{{Box3 | |||
|<apll>Z←⎕AV</apll> | |||
|returns the Atomic Vector for the NARS2000 system. | |||
|<apll>Z</apll> is a character vector with 2<sup>16</sup> (65,536) elements.}} | |||
<p>Because NARS2000 is based upon Unicode (i.e., UCS-2), its Atomic Vector has one element for each possible 16-bit character value. Moreover, the elements of the Atomic Vector are ordered such that, in index-origin zero, <apll>((⌈2⍟⍴⎕AV)⍴2)⊤⎕AV⍳'X'</apll> gives the bit representation of <apll>'X'</apll>.</p> | <p>Because NARS2000 is based upon Unicode (i.e., UCS-2), its Atomic Vector has one element for each possible 16-bit character value. Moreover, the elements of the Atomic Vector are ordered such that, in index-origin zero, <apll>((⌈2⍟⍴⎕AV)⍴2)⊤⎕AV⍳'X'</apll> gives the bit representation of <apll>'X'</apll>.</p> | ||
Revision as of 07:11, 22 February 2013
⎕AV - Atomic Vector
⎕AV is an ISO 13751 standard niladic system function which returns the entire character set.
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| Z is a character vector with 216 (65,536) elements. |
Because NARS2000 is based upon Unicode (i.e., UCS-2), its Atomic Vector has one element for each possible 16-bit character value. Moreover, the elements of the Atomic Vector are ordered such that, in index-origin zero, ((⌈2⍟⍴⎕AV)⍴2)⊤⎕AV⍳'X' gives the bit representation of 'X'.
Note that ⎕AV is a niladic function, you cannot assign anything to it.
| 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 | |||||||||
