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Re: Non-regex Methods of Extracting the Last Field from a Record

by blokhead (Monsignor)
on May 08, 2009 at 01:35 UTC ( #762735=note: print w/replies, xml ) Need Help??

in reply to Non-regex Methods of Extracting the Last Field from a Record

You can even do it avoiding the temporary list generated by split. Instead, you can use rindex to go directly to the appropriate part of the string:
my $rec = " 2425 S 25 \" 6 47! 86 18 21! 87 23 23! - + -! - -! 96"; my $last = substr $rec, 1 + rindex($rec, " "); print $last, $/;
I'm only posting this for the sake of completeness. This only works because your record separator is whitespace. rindex won't generalize as well as split (more complicated separators, picking out records other than the last, ignoring trailing empty records).


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[Corion]: I already showed you the simple regex to match the last part of a string without a comma in it
[Tux]: Corion++ hippo++
[ovedpo15]: it isn't homework. its a module I use at work. The process to add additional module isn't worth it. p.s never heard a university course which teach perl
[marto]: there are many, to this day.
[ovedpo15]: @Corion Yes I use the regex you showed me. its very good regex. although now i need to know that substring unit that comma
marto mad corrections to one around 18 months ago
[ovedpo15]: my code checks the value after that comma, if it isn't valid it will remove it. so I would like to remove the substring after that comma meaning getting the string before comma.
[hippo]: Are you sure that Text::CSV_XS isn't already installed at your work? It's such a useful module that it might well be there.
[marto]: pointing out the advantages of cpan modules is well worth in, as both developer and $client/$company benefit greatly
[Tux]: $src =~ m{^(.*),(.*)$/ and $2 !~ $valid and $src = $1;

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