Hello All,

We need to extract from a text a 3-digit numbers surrounded by certain
text. For example, we need to extract 199 surrounded by "MESSAGE TYPE"
and "SYSTEM/INPUT":

MESSAGE TYPE 199 SYSTEM/INPUT

What would be Perl regular expression for this?

Thank you,
Alona

Alona wrote:
> Hello All,
>
> We need to extract from a text a 3-digit numbers surrounded by certain
> text. For example, we need to extract 199 surrounded by "MESSAGE TYPE"
> and "SYSTEM/INPUT":
>
> MESSAGE TYPE 199 SYSTEM/INPUT
>
> What would be Perl regular expression for this?

This is regular expression 101. What have you tried?

Alona wrote:
> Hello All,
>
> We need to extract from a text a 3-digit numbers surrounded by certain
> text. For example, we need to extract 199 surrounded by "MESSAGE TYPE"
> and "SYSTEM/INPUT":
>
> MESSAGE TYPE 199 SYSTEM/INPUT
>
> What would be Perl regular expression for this?

$yourtext =~ m!MESSAGE TYPE (\d{3}) SYSTEM/INPUT!;

Now, what is your real question? It will take you a long time to get
your program written one line at a time.

--

Henry Law Manchester, England

On Fri, 01 Feb 2008 13:58:10 -0800, Alona wrote:

> Hello All,
>
> We need to extract from a text a 3-digit numbers surrounded by certain
> text. For example, we need to extract 199 surrounded by "MESSAGE TYPE"
> and "SYSTEM/INPUT":
>
> MESSAGE TYPE 199 SYSTEM/INPUT
>
> What would be Perl regular expression for this?

If you read perldoc perlre you would quickly see that this would be

/MESSAGE TYPE (\d+) SYSTEM\/INPUT/

HTH,
M4