CODEWITHSUNDEEP
regexant
mlevit
mlevit

Reputation: 2736

Regex with splitting a string with pipes

Can't figure this one out at all.

I have the following string aaa||bbb||ccc. I'd like to split by ||.

I had a Regex that worked for aaa||bbb which was (.*)\|\|(.*) but that doesn't work for 3 values or more.

I need one to work for unlimited number of values.

Thanks

EDIT: Sorry forgot to mention. I'm using Ant with PropertyRegex task from Ant-Contrib library.

So basically just need the plain regex.

Upvotes: 2

Views: 2653

Answers (5)

Rebse
Rebse

Reputation: 10377

you may use the split function from Ant Addon Flaka, f.e. :

<project name="demo" xmlns:fl="antlib:it.haefelinger.flaka">
 <property name="somestring" value="aaa||bbb||ccc"/>

 <fl:let>counter = 0</fl:let>
  <fl:for var="substring" in="split('${somestring}','\|\|')">
   <fl:let>counter = counter + 1</fl:let>
   <!-- simple echo -->
   <fl:echo>substring #{counter} => #{substring}</fl:echo>
   <!-- create properties for further processing -->
   <fl:let>substring#{counter} := '#{substring}'</fl:let>
  </fl:for>

  <echo>
   $${substring1} => ${substring1}
   $${substring2} => ${substring2}
   $${substring3} => ${substring3}
  </echo>
</project>

output :

Buildfile: /home/rosebud/AntTest/tryme.xml
  [fl:echo] substring 1 => aaa
  [fl:echo] substring 2 => bbb
  [fl:echo] substring 3 => ccc
     [echo]     ${substring1} => aaa
     [echo]     ${substring2} => bbb
     [echo]     ${substring3} => ccc

Upvotes: 0

black panda
black panda

Reputation: 2991

How about a variation of the following:

[^|]+(?:\|\|[^|]+)*
  1       2   1

Where 1 matches anything but a pipe and 2 matches your separator?

Matches-->aaa
Matches-->aaa||bbb
Matches-->aaa||bbb||ccc
Matches-->aaa||bbb||ccc||ddd
Does not match-->aaa||
Does not match-->aaa|bbb
Does not match-->aaa|bbb|ccc

Upvotes: 1

doit4dotnet
doit4dotnet

Reputation: 1

The below code will resolve this

string x1 = "aaa||bbb||ccc";

string[] result = Regex.Split(x1, @"\|\|");

you can use this too

string[] parts = x1.Split(new string[] { "||" }, StringSplitOptions.None);

Upvotes: 0

ruakh
ruakh

Reputation: 183251

You can't do that with a plain regex-match; rather, you need to use a "split" function of some stripe. This will depend on the language you're using. For example, in Java you could write:

final String[] fields = "aaa||bbb||ccc".split("[|][|]", -1);

or in Perl:

my @fields = split /\|\|/, 'aaa||bbb||ccc', -1;

If you update your question to indicate what language you're using, you'll get a more helpful answer.

Upvotes: 0

codaddict
codaddict

Reputation: 454960

Instead of matching and using captured groups, you can split the string on || using the regex:

\|\|

Upvotes: 3

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