Groups > microsoft.public.scripting.vbscript > #11141

Re: VbScript and .NET objects

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From	"Dave \"Crash\" Dummy" <invalid@invalid.invalid>
Newsgroups	microsoft.public.scripting.vbscript
Subject	Re: VbScript and .NET objects
Date	Sun, 30 Aug 2015 21:45:07 -0400
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Mayayana wrote:
> | > Pt1 = Instr(1, s2, "apple", 0)
> | > s3 = Mid(s, Pt1, 5)
> | > s3 then returns apple, Apple, APPLE, etc.
> | >
> | >   The non-case sensitive version of Instr has to
> | > do a more complex search. The binary version
> | > just needs to look for a matching byte value.
> |
> | How does one implement this in VBS w/o the Mid() function?<g>
> |
> 
>   I'm not sure I get that. Are you referring
> to my comment about missing the Mid statement
> in VBS? As a VBer I expect you probably know
> the difference between the Mid statement
> and the Mid function. Did I miss something?
> 
>   For those who don't know, the Mid statement
> can be used to build strings in VB:
> 
> Replaces characters in s1, starting with offset 101:
> 
> Mid(s1, 101) = "sample"
> 
>   It's very efficient because it doesn't require
> memory allocation. It just writes the data
> directly into the string variable memory. The
> equivalent in VBS is something like:
> 
> s2 = Left(s1, 100)
> s3 = Right(s1, Len(s1) - 106)
> s1 = s2 & "sample" & s3
> 
>   Three new string allocations. s2, s3 and a
> new allocation for s1. Very sloppy and very
> slow. Like binary operations, the Mid statment
> is a glaring omission in VBS. But using an array
> as a string builder comes close to the efficiency
> of Mid. 

I use the Mid function to emulate the lacking Mid statement:

s1=mid(s1,1,100) & "sample" & mid(s1,101)

As always in VBS, there are several ways to perform a task. Not 
recommended, but works:

s1=replace(s1,left(s1,100),left(s1,100) & "sample",1,1)

-- 
Crash

Registered pedophobe

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VbScript and .NET objects noone@no.void (Reventlov) - 2015-08-29 12:40 +0000
  Re: VbScript and .NET objects "Mayayana" <mayayana@invalid.nospam> - 2015-08-29 10:39 -0400
    Re: VbScript and .NET objects "Mayayana" <mayayana@invalid.nospam> - 2015-08-29 10:55 -0400
      Re: VbScript and .NET objects GS <gs@v.invalid> - 2015-08-30 12:25 -0400
        Re: VbScript and .NET objects "Mayayana" <mayayana@invalid.nospam> - 2015-08-30 12:55 -0400
          Re: VbScript and .NET objects GS <gs@v.invalid> - 2015-08-30 13:02 -0400
            Re: VbScript and .NET objects GS <gs@v.invalid> - 2015-08-30 13:10 -0400
              Re: VbScript and .NET objects "Mayayana" <mayayana@invalid.nospam> - 2015-08-30 13:42 -0400
                Re: VbScript and .NET objects GS <gs@v.invalid> - 2015-08-30 14:04 -0400
                Re: VbScript and .NET objects "Mayayana" <mayayana@invalid.nospam> - 2015-08-30 17:05 -0400
                Re: VbScript and .NET objects GS <gs@v.invalid> - 2015-08-30 17:14 -0400
          Re: VbScript and .NET objects "Dave \"Crash\" Dummy" <invalid@invalid.invalid> - 2015-08-30 21:45 -0400
            Re: VbScript and .NET objects "Mayayana" <mayayana@invalid.nospam> - 2015-08-30 23:09 -0400
              Re: VbScript and .NET objects "Dave \"Crash\" Dummy" <invalid@invalid.invalid> - 2015-08-31 07:40 -0400
                Re: VbScript and .NET objects "Mayayana" <mayayana@invalid.nospam> - 2015-08-31 09:50 -0400
    Re: VbScript and .NET objects johnbeschler@gmail.com - 2017-03-15 10:24 -0700
      Re: VbScript and .NET objects "Mayayana" <mayayana@invalid.nospam> - 2017-03-15 14:40 -0400
        Re: VbScript and .NET objects "Mayayana" <mayayana@invalid.nospam> - 2017-03-15 21:38 -0400

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