split string

[Peter K]

Hi

I am looking for an elegant method for splitting strings with the following
format into its separate parts:

<id><language>< version>

id is always 32 characters long;
language is a representation of language/locale (eg. "en" or "da-DK");
version is always a number (eg. "3" or "17" or "665");

for example:
a29b4372003c234 5719de23a637251 02da-DK86
a29b4372003c234 5719de23a637251 02en4

Obviously obtaining the first 32 characters is easy. But I need a nice way
of getting the language and version substrings. At the moment I start at
the end and work backwards until I find the first non-digit character (then
I know I have the version substring). But is there a better way?
Thanks,
Peter

[Jon Skeet [C# MVP]]

On Apr 3, 8:16 am, Peter K <xdz...@hotmail .comwrote:

I am looking for an elegant method for splitting strings with the following
format into its separate parts:

<id><language>< version>

id is always 32 characters long;
language is a representation of language/locale (eg. "en" or "da-DK");
version is always a number (eg. "3" or "17" or "665");

for example:
a29b4372003c234 5719de23a637251 02da-DK86
a29b4372003c234 5719de23a637251 02en4

Obviously obtaining the first 32 characters is easy. But I need a nice way
of getting the language and version substrings. At the moment I start at
the end and work backwards until I find the first non-digit character (then
I know I have the version substring). But is there a better way?

Well, I'd stick to using Substring for the first 32 characters, but
you *could* use a regular expression for splitting the language and
version. Alternatively, you could use String.IndexOfA ny and Substring
again. I suspect that would be clearer, but may not perform as well.
The version which would probably perform best would be more
longwinded:

string id = data.Substring( 0, 32);
for (i=32; i < data.Length; i++)
{
if (char.IsDigit(d ata[i]))
{
string language = data.Substring( 32, 32-i);
string version = data.Substring( i);
// Do whatever and return
}
}
// If you get to here, you haven't found anything - error?

I'd go with whatever you find clearest unless performance is really
important, in which case try everything and measure!

Jon

[DeveloperX]

On 3 Apr, 08:30, "Jon Skeet [C# MVP]" <[e-mail] wrote:

On Apr 3, 8:16 am, Peter K <xdz...@hotmail .comwrote:

I'd go with whatever you find clearest unless performance is really
important, in which case try everything and measure!

Jon- Hide quoted text -

- Show quoted text -

Can I say measure twice and split once ;) Sorry couldn't resist,
carpentry humour meets c# at last :)

There's a typo in the above: Try

string language = data.Substring( 32 , i-32);

Cheers

[Jon Skeet [C# MVP]]

DeveloperX <nn*****@operam ail.comwrote:

<snip>

There's a typo in the above: Try

string language = data.Substring( 32 , i-32);

Whoops - yes, thanks very much :)

--
Jon Skeet - <sk***@pobox.co m>
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