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Re: regular expression for the address

by philiprbrenan (Monk)
on Aug 29, 2012 at 13:11 UTC ( #990463=note: print w/replies, xml ) Need Help??


in reply to regular expression for the address

May I urge you to redact possibly live data? Thanks.

use feature ":5.14"; use warnings FATAL => qw(all); use strict; my $var = << 'END'; 11,2222222,"xxxxxx'x xxxxxxx, xxxxxxxxx",sssss (aaa 111) 1111-a ,aaaaa +aa aa ,aaaaaa, ,xxxxxxxx,dd/dd/dd,xx, (195.16),111111 END say eval [split /,\s*/, $var]->[-2]

Produces

195.16

Replies are listed 'Best First'.
Re^2: regular expression for the address
by linuxer (Curate) on Aug 29, 2012 at 20:16 UTC

    What do you use that eval for? Only for eliminating the parentheses? Bad idea, I think.

    Let's assume there is a list of strings from which the value of the second last field is wanted.

    If there is a bad data source, that eval would execute bad stuff like system("echo Hello World.") or even worse...

    $ perl use feature ":5.14"; use warnings FATAL => qw(all); use strict; my $var = << 'END'; 11,2222222,"xxxxxx'x xxxxxxx, xxxxxxxxx",sssss (aaa 111) 1111-a ,aaaaa +aa aa ,aaaaaa, ,xxxxxxxx,dd/dd/dd,xx, system('echo bad command execut +ed!!'),111111 END say eval [split /,\s*/, $var]->[-2] bad command executed!! 0
    If you want to remove the parentheses, you could use an tr///. For example:
    use feature ":5.14"; use warnings FATAL => qw(all); use strict; my $var = << 'END'; 11,2222222,"xxxxxx'x xxxxxxx, xxxxxxxxx",sssss (aaa 111) 1111-a ,aaaaa +aa aa ,aaaaaa, ,xxxxxxxx,dd/dd/dd,xx, (195.14) ,111111 END my $interest = split /,\s*/, $var)[-2]; $interest =~ tr/0-9.//cd; say $interest;

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[Corion]: Hmm. I think overnight I decided on simplifying some code. I have plugin classes that do data import (.csv, .yml, .json) and for that create objects on which then ->load() is called. But YAML::XS doesn't have an object, so I wrote my own wrapper.
[Corion]: This evening, I'll kill that wrapper again, and just call LoadFile() in the plugin class directly instead of creating a go-between object for no real gain.
[Corion]: Writing these import plugins was really nice though - in about 2 hours, I had imports for CSV, YAML and JSON, and adding XLS(X), SQLite (or DBI) data sources is also trivial. I'm idly wondering about separating the plugin into transport+parser, so ...
[Corion]: ... http:// URLs could be retrieved and then parsed, but I think that that would be overkill for a toy static site generator ;)

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