Elan, I reported this and its been assigned #1052. Carl has me convinced
that '- is an alias for 'negate. It also functions as an in-fix (am I using
the right term?) operator.
>> 5 - 4
== 1
>> 5 ( - 4)
== -4
>> - 5 4
== 4
>>
Personally, I don't think '- should be used as an alias for 'negate, though
of course '- used as a prefix is ok.
Part of the problem is that '- is an allowable character in a word, even for
the first character, so '- is actually a word. The same can be said for +.
I've given up and retreated to the position that the Dictionary should
describe all this weirdness, rather than showing only the - followed by two
arguments version - leaving the user to find the true definition by
experimentation!!??
Russell, [EMAIL PROTECTED]
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, October 22, 1999 10:01 AM
Subject: [REBOL] Use of - in prefix notation.
>
> -- Hi folks,
> Has anyone noticed and previously reported the fact the + and - used as
prefix operators
> act asimmetrically? + performs an addition on two arguments, - turns the
first argument
> into a negative value, discards it and returns the second argument:
>
> >> - 3 4
> == 4
>
> Do you find this to be intuitive, reasonable, preferable?
>
> Elan
>
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>
>
>
