Re: How to extract special charachetrs like <=, >= != from string

If all your trying to do is extract those specific characters, then this might work for you:

use strict;
use warnings;


while (<DATA>) {
print "$1\n" if $_ =~ /(!=|<=|>=|==)/;
    }

__DATA__
$this <= $that
$this lt $that
$this >= $that
$this gt $that
$this != $that
$this ne $that
$this == $that
$this eq $that
[download]

I do suggest you read up on Regular Expressions as it will help you out tremendously on your journey :)

Comment on Re: How to extract special charachetrs like <=, >= != from string Download Code

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Re^2: How to extract special charachetrs like <=, >= != from string by vinoth.ree (Monsignor) on Aug 14, 2015 at 05:49 UTC
We can even shorten this with character class [] `use strict; use warnings; use Data::Dumper; while(<DATA>) { print "$1\n" if($_ =~ /([><=!]+)/g) } __DATA__ $this vinoth $that $this >= $that $this gt $that $this != $that $this ne $that $this == $that $this eq $that` [download] *All is well. I learn by answering your questions...*	[reply] [d/l]
Re^3: How to extract special charachetrs like <=, >= != from string by Anonymous Monk on Aug 14, 2015 at 08:13 UTC
Hi all, Solution provided by james28909 did work for me. thanks --girija	[reply]
Re^3: How to extract special charachetrs like <=, >= != from string by james28909 (Deacon) on Aug 14, 2015 at 05:52 UTC
My question to this is, how does it know to print the `=` after the `><=!` ? Maybe i am missing a key piece of data/knowledge which would not surprise me lol.	[reply] [d/l] [select]
Re^4: How to extract special charachetrs like <=, >= != from string by choroba (Cardinal) on Aug 14, 2015 at 05:58 UTC
Because of the +. لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ	[reply]
Re^4: How to extract special characters like <=, >= != from string by soonix (Chancellor) on Aug 14, 2015 at 06:44 UTC
actually, it matches also `=>`, `<>`, `!!`, `<=>`, or in fact any combination of these four characters. It says "match these characters, one or more times". If you want only one of the 4 characters followed by a single "=", you'd write `[!<=>]=`	[reply] [d/l] [select]
Re^4: How to extract special charachetrs like <=, >= != from string by vinoth.ree (Monsignor) on Aug 14, 2015 at 06:30 UTC
++choroba james28909, It could be great if you read this line + Match 1 or more times from the link you shared Regular Expressions *All is well. I learn by answering your questions...*	[reply] [d/l]
Re^5: How to extract special charachetrs like <=, >= != from string by james28909 (Deacon) on Aug 14, 2015 at 06:45 UTC
Re^6: How to extract special characters like <=, >= != from string by soonix (Chancellor) on Aug 14, 2015 at 07:18 UTC