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Message from discussion we need more ops.
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Eric Kidder  
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 More options Jul 29 2002, 4:48 pm
Newsgroups: perl.perl6.internals
From: kagen...@persian.evilkitten.org (Eric Kidder)
Date: Mon, 29 Jul 2002 15:05:35 -0500 (EST)
Local: Mon, Jul 29 2002 4:05 pm
Subject: Re: we need more ops.
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On Mon, 29 Jul 2002, Nicholas Clark wrote:
> [Maybe we should have a competition to suggest the most crazy three character
> operator - ie state your sequence of three characters (not necessarily ASCII,
> but it helps), state their name, and state their purpose (including whether
> listop, binop, uniop, precedence, associativity or whatever else helps make
> your entry more humorous. So presumably there could be a :-) operator, but
> offhand I can't think of something plausible it could do. And does the
> tie-fighter need an X-wing operator to complement it? (not sure what that
> one would look like, let alone what it would do)]

:-)     the Positivity operator ("happy face")
        On the left-hand side of an expression, it tests whether the
        expression contains a positive value.  On the right-hand side, it
        transforms the results of the expression into a positive value.
        How it does this is implementation dependent.
        This operator has right-hand side precendence.

Other operators in this vein are :-(, the "Negativity" operator, and :-|,
the "Zero" operator.

Examples:

        print :-) "-1";               # prints "0"
        print "-1" :-);               # prints some positive value, probably "1"
        print -1 :-( :-) :-|;   # prints some zero value, probably "0"

What we really need are see no evil, hear no evil, speak no evil
operators.

And on a complete aside, here is something I dug up in 'fortune'.  Some of
these are actually useful!

Proposed Additions to the PDP-11 Instruction Set:
BBW     Branch Both Ways
BEW     Branch Either Way
BBBF    Branch on Bit Bucket Full
BH      Branch and Hang
BMR     Branch Multiple Registers
BOB     Branch On Bug
BPO     Branch on Power Off
BST     Backspace and Stretch Tape
CDS     Condense and Destroy System
CLBR    Clobber Register
CLBRI   Clobber Register Immediately
CM      Circulate Memory
CMFRM   Come From -- essential for truly structured programming
CPPR    Crumple Printer Paper and Rip
CRN     Convert to Roman Numerals
DC      Divide and Conquer
DMPK    Destroy Memory Protect Key
DO      Divide and Overflow
EMPC    Emulate Pocket Calculator
EPI     Execute Programmer Immediately
EROS    Erase Read Only Storage
EXCE    Execute Customer Engineer
HCF     Halt and Catch Fire
IBP     Insert Bug and Proceed
INSQSW  Insert into queue somewhere (for FINO queues [First in never out])
PBC     Print and Break Chain
PDSK    Punch Disk
PI      Punch Invalid
POPI    Punch Operator Immediately
PVLC    Punch Variable Length Card
RASC    Read And Shred Card
RPM     Read Programmers Mind
RSSC    reduce speed, step carefully  (for improved accuracy)
RTAB    Rewind tape and break
RWDSK   rewind disk
RWOC    Read Writing On Card
SCRBL   scribble to disk  - faster than a write
SLC     Search for Lost Chord
SPSW    Scramble Program Status Word
SRSD    Seek Record and Scar Disk
STROM   Store in Read Only Memory
TDB     Transfer and Drop Bit
WBT     Water Binary Tree


 
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