regular expression help: catch this: |TrxId=475665| - regex

Question

For example I have a string:
MsgNam=WMS.WEATXT|VersionsNr=0|TrxId=475665|MndNr=0257|Werk=0000|WeaNr=0171581054|WepNr=|WeaTxtTyp=110|SpraNam=ru|WeaTxtNr=2|WeaTxtTxt=100 111|
and I want to catch this: |TrxId=475665|
after TrxId= it could be any numbers and any amount of them, so regex should catch as well:
|TrxId=111333| and |TrxId=0000011112222| and |TrxId=123|

Answer 1

TrxId=(\d+)
That would give a group (1) with the TrxId.
PS: Use global modifier.

Answer 2

The regex should look somewhat like this:
TrxId=[0-9]+
It will match TrxId= followed by at least one digit.

Answer 3

An example solution in Python:
In [107]: data = 'MsgNam=WMS.WEATXT|VersionsNr=0|TrxId=475665|MndNr=0257|Werk=0000|WeaNr=0171581054|WepNr=|WeaTxtTyp=110|SpraNam=ru|WeaTxtNr=2|WeaTxtTxt=100 111|'
In [108]: m = re.search(r'\|TrxId=(\d+)\|', data)
In [109]: m.group(0)
Out[109]: '|TrxId=475665|'
In [110]: m.group(1)
Out[110]: '475665'

Answer 4

/MsgNam\=.*?\|(TrxId\=\d+)\|.*/
for example in perl:
$a = "MsgNam=WMS.WEATXT|VersionsNr=0|TrxId=475665|MndNr=0257|Werk=0000|WeaNr=0171581054|WepNr=|WeaTxtTyp=110|SpraNam=ru|WeaTxtNr=2|WeaTxtTxt=100111|";
$a =~ /MsgNam\=.*?\|(TrxId\=\d+)\|.*/;
print $1;
will print TrxId=475665

Answer 5

You know what your delimiters look like, so you don't need a regex, you need to split. Here's an implementation in Perl.
use strict;
use warnings;
my $input = "MsgNam=WMS.WEATXT|VersionsNr=0|TrxId=475665|MndNr=0257|Werk=0000|WeaNr=0171581054|WepNr=|WeaTxtTyp=110|SpraNam=ru|WeaTxtNr=2|WeaTxtTxt=100 111|";
my #first_array = split(/\|/,$input); #splitting $input on "|"
#Now, since the last character of $input is "|", the last element
#of this array is undef (ie the Perl equivalent of null)
#So, filter that out.
#first_array = grep{defined}#first_array;
#Also filter out elements that do not have an equals sign appearing.
#first_array = grep{/=/}#first_array;
#Now, put these elements into an associative array:
my %assoc_array;
foreach(#first_array)
{
if(/^([^=]+)=(.+)$/)
{
$assoc_array{$1} = $2;
}
else
{
#Something weird may be happening...
#we may have an element starting with "=" for example.
#Do what you want: throw a warning, die, silently move on, etc.
}
}
if(exists $assoc_array{TrxId})
{
print "|TrxId=" . $assoc_array{TrxId} . "|\n";
}
else
{
print "Sorry, TrxId not found!\n";
}
The code above yields the expected output:
|TrxId=475665|
Now, obviously this is more complex than some of the other answers, but it's also a bit more robust in that it allows you to search for more keys as well.
This approach does have a potential issue if your keys appear more than once. In that case, it's easy enough to modify the code above to collect an array reference of values for each key.