Re: Now, I have “Left(StringSource, CharCount)” and “Right(StringSource, CharCount)”
Re: Now, I have “Left(StringSource, CharCount)” and “Right(StringSource, CharCount)”
- Subject: Re: Now, I have “Left(StringSource, CharCount)” and “Right(StringSource, CharCount)”
- From: "Mark J. Reed" <email@hidden>
- Date: Mon, 27 Oct 2008 22:55:18 -0400
And for commpleteness:
to StringMid(s, f, l)
text f through (f + l - 1) of s
end StringMid
On Mon, Oct 27, 2008 at 9:47 PM, Christopher Nebel <email@hidden> wrote:
> On Oct 26, 2008, at 7:40 AM, Emile SCHWARZ wrote:
>
>> Here are the two other functions to work with string (that I missed, more
>> or less):
>>
>> display dialog my StringLeft("Salut les filles.", 5) -- Display: "Salut"
>> display dialog my StringRight("Salut les filles.", 7) -- Display:
>> "filles."
>>
>> -- ********** ********** ********** ********** **********
>> --
>> -- "StringLeft(StringSource, CharCount)" handler definition
>> on StringLeft(StringSource, CharCount)
>> -- StringSource: the string you want to extract characters from
>> -- CharCount: the number of characters you want to get back
>> -- TargetString: the stripped string to be returned
>> -- declare some variables
>> set TargetString to ""
>> -- store the wanted string
>> set TargetString to (characters 1 thru CharCount of StringSource) as
>> string
>> -- return the wanted string
>> return TargetString
>> end StringLeft
>>
>>
>> -- ********** ********** ********** ********** **********
>> --
>> -- "StringRight(StringSource, CharCount)" handler definition
>> --
>> on StringRight(StringSource, CharCount)
>> -- StringSource: the string you want to extract characters from
>> -- CharCount: the number of characters you want to get back
>> -- TargetString: the stripped string to be returned
>> -- declare some variables
>> set TargetString to ""
>> set StringOffset to 0
>> set StringLength to 0
>> -- compute the source string length
>> set StringLength to count of characters in StringSource
>> -- compute the string offset
>> set StringOffset to (StringLength - CharCount) + 1
>> -- store the wanted string
>> set TargetString to (characters StringOffset thru ((StringOffset - 1) +
>> CharCount) of StringSource) as string
>> -- return the wanted string
>> return TargetString
>> end StringRight
>>
>> PS: if there is room to improve these handlers, please, share.
>
> Reduced to their bare minimum:
>
> to StringLeft(s, n)
> return text 1 thru n of s
> end StringLeft
>
> to StringRight(s, n)
> return text -n thru -1 of s
> end StringRight
>
> For StringRight, we're exploiting AppleScript's feature of negative indexes,
> which are defined to count backwards from the end of the container.
>
>
> --Chris Nebel
> AppleScript Engineering
>
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--
Mark J. Reed <email@hidden>
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