[Solved] groovy regex or pattern making

Question

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Groovy

regular-expression

string

, +

A quick quest: We want the result looks like this; from aaa---bbb-ccc into aaa.bbb.ccc

What I have tried:

Groovy

def objective = "aaa---bbb-ccc"
objective.replace(/.*[-]+.*/, '.')

How do we create a proper pattern of Regular expression in Groovy?

Posted 15-Apr-22 15:47pm

Phoenix Liveon

Updated 22-May-22 3:02am

v2

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3 solutions

Solution 1

Did you tried this ?

def objective = "aaa---bbb-ccc"
objective.replace(/[-]+/, '.')

Just a few interesting links to help building and debugging RegEx.
Here is a link to RegEx documentation:
perlre - perldoc.perl.org[^]
Here is links to tools to help build RegEx and debug them:
.NET Regex Tester - Regex Storm[^]
Expresso Regular Expression Tool[^]
RegExr: Learn, Build, & Test RegEx[^]
Online regex tester and debugger: PHP, PCRE, Python, Golang and JavaScript[^]
This one show you the RegEx as a nice graph which is really helpful to understand what is doing a RegEx: Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.[^]
This site also show the Regex in a nice graph but can't test what match the RegEx: Regexper[^]

Posted 15-Apr-22 16:58pm

Patrice T

Comments

Phoenix Liveon 15-Apr-22 23:21pm

Yes, but it still not working.

Patrice T 15-Apr-22 23:48pm

What result do you get ?

Phoenix Liveon 16-Apr-22 0:08am

It still has the same output. "aaa---bbb-ccc"

Solution 2

That's because you don't use the "non-hyphen" data in your replacement.
Try this:

(.*?)-+(.+?)-(.*)

And this replacement string:

$1.$2.$3

Posted 15-Apr-22 19:31pm

OriginalGriff

Comments

Phoenix Liveon 16-Apr-22 1:42am

It still not working?

def objective = "aaa---bbb-c"
objective.replace(/(.*?)-+(.+?)-(.*)/, '.')

OR either this one:

 objective.replace(/(.*?)-+(.+?)-(.*)/, '$1.$2.$3')

if this is working, We would like to have a dynamic pattern.

Phoenix Liveon 16-Apr-22 1:45am

We are really grateful for the responses that we have here. We're still searching for it.

OriginalGriff 16-Apr-22 2:04am

It works for me:

var x = "123---abc-d";
var y = x.replace(/(.*?)-+(.+?)-(.*)/, '$1.$2.$3');
alert(y);

I get "123.abc.d"
You do realize that the replace functions doesn't modify the original string, but returns a new, changed string?

Phoenix Liveon 16-Apr-22 2:11am

Yes, but the output is not we expected to be.

println( objective.replace(/(.*?)-+(.+?)-(.*)/, '$1.$2.$3') )

I use "println" in groovy. But the javascript you define is valid but in groovy when I println it, it did not.

Phoenix Liveon 16-Apr-22 2:15am

I will try to store it to a name variable first, then print it to the console "println". pls wait for my test output. For some reason the IDE stuck at boot logo.

Phoenix Liveon 16-Apr-22 2:24am

It still has the same outcome. I Tried this one:

println( objective.toString().replace(/-/, '.') )

The output is aaa...bbb.c And we tried this:

(/[-]+/, '.')

but its a no no

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Phoenix Liveon · Accepted Answer · 2022-04-15T20:32:00

Solution 3

I found some answer and this is what its looks like we substitute method "replace" with "replaceALL";

def objective = "aaa---bbb-c"
println( objective.replaceAll(/[-]+/, '.') )

Posted 15-Apr-22 20:32pm

Phoenix Liveon

Updated 15-Apr-22 20:46pm

v2

Comments

Phoenix Liveon 16-Apr-22 5:20am

Then we could do this;

def objective = "---aaa---bbb-c--"
objective.replaceAll(/[-]+/, '.').replaceAll( /^[\.]+(?=)|(?<=)[\.]+$/, '')

or do this;

def objective = "----.,,,aaa-,,,, ...--bbb-,.. c--   --"
println( objective.replaceAll(/[- \.,]+/, '.').replaceAll( /^[ \.,]+(?=)|(?<=)[ \.,]+$/, '') )

Phoenix Liveon 16-Apr-22 5:30am

How do we group this one? /^[ \.,]+(?=)|(?<=)[ \.,]+$/ into ...Copy Code

/^([ \.,]+)(?=)|(?<=)\1$/

ORCopy Code

/^(?<name>[ \.,]+)(?=)|(?<=)\name$/