Ahh, but it's not a constant, now, is it?
>> foo: does [
[ bar: "Hello"
[ ]
>> append second :foo [print bar print bar]
== [
bar: "Hello" print bar print bar
]
>> insert skip second :foo 4 [append bar { to you!}]
== [print bar]
>> source foo
foo: func [][
bar: "Hello" print bar append bar " to you!" print bar
]
>> foo
Hello
Hello to you!
This is a nice(ish) way to modify large already-existing functions without
having to copy the whole source into a script.
> By "constant" I meant hard-coded, literal values. For example:
>
> foo: does [
> bar: "Hello"
> ]
>
> Bar is a copy of "Hello", and not pointing directly to "Hello". So =?
> would
> fail. I agree, this could cause other problems. I really do like the way
> REBOL handles this already, but it certainly took a bit to 1) find out,
> and
> 2) remember and get used to.
>
> I didn't know that's how join worked. Thanks! That can definitely simplify
> some code. I do think that an operator would be nice just from a code
> simplication stand-point, but beauty is also in the eye of the beholder.
>
> Jeff M.
>
> --
> [EMAIL PROTECTED]
>
> On 5/2/06, Gabriele Santilli <[EMAIL PROTECTED]> wrote:
>>
>>
>> Hi Jeff,
>>
>> On Monday, May 1, 2006, 7:50:13 PM, you wrote:
>>
>> JM> 1. Make "constant" data just that - constant. Make the copy implicit
>> when
>> JM> binding a word to constant data. This would be quite easy, and would
>> solve a
>> JM> lot of headaches before they happen.
>>
>> By constant data, you mean any LOADed data? I sense more problems
>> here than solutions. :)
>>
>> JM> 2. Have a series building operator (++ comes to mind from Haskell),
>> which
>> JM> acts as a copy + append. This is a little scarey, because I think
>> most
>> JM> people would just use ++ instead of append, and without knowing that
>> it does
>> JM> a copy, we're back to potential O(n^2) performance issues.
>>
>> >> source join
>> join: func [
>> "Concatenates values."
>> value "Base value"
>> rest "Value or block of values"
>> ][
>> value: either series? value [copy value] [form value]
>> repend value rest
>> ]
>>
>> So the only difference is that JOIN is copy + repend instead of
>> copy + append.
>>
>> Regards,
>> Gabriele.
>> --
>> Gabriele Santilli <[EMAIL PROTECTED]> --- http://www.rebol.com/
>> Colella Chiara software division --- http://www.colellachiara.com/
>>
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>>
>>
>
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