[REBOL] Re: Find? Copy/Part?
From: carlos:lorenz:gma:il at: 18-Jan-2005 15:05
Ingo,
Thanks for you reply.
I dir not think about parse though I can see you solve it using it.
Parse yet has a not so confortable sintax to me so I try to avoid the
use of it most part of the time.
I'd like to have something just like I get in Visual Fox Pro. See below:
* ------------------------------------------
a = "aaa*aaa*aaa*aaa"
* gets the second ocurrence of "*" in the string from left to right
pos = at( "*" , a , 2)
* then asking VFP to grab a piece of the string up to the
* second "*" in the string a
? left(a,pos)
* gives the result
aaa*aaa*
* -------------------------------------------
Would it be very nice to have an AT-like native function in
REBOL/Core, don't you think so?
On Tue, 18 Jan 2005 23:38:43 +0900, Ingo Hohmann <[ingo--2b1--de]> wrote:
> Hi Carlos,
>
> here are the first 4 ideas I got
>
> >> profiler/test [index? find next find str #"*" #"*"] 100000
>
> == [0:00:00.213723]
> >> profiler/test [parse str [2 [thru "*"] here: (pos: subtract index?
> here 1)]] 100000
> == [0:00:00.156568]
> >> profiler/test [parse str [2 [thru #"*"] here: (pos: subtract index?
> here 1)]] 100000
> == [0:00:00.14909]
> >> profiler/test [parse str [thru #"*" to #"*" here: (pos: index? here
> )]] 100000
> == [0:00:00.106628]
>
> As you'll clearly notice, parse is your friend ;0)
>
> I hope that helps
>
> Ingo
>
> Carlos Lorenz wrote:
> > Hi list,
> >
> > Suppose I have str: "aaa*aaa*aaa*aaa"
> >
> > Wich is the best way to get the position of second "*" at word str?
> >
> >
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--
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Carlos Lorenz
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