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groovy

How to remove Duplicate Values from a list in groovy

I have a collection of ID list to be saved into the database 

if(!session.ids)
session.ids = []

session.ids.add(params.id)

and I found out that list has duplicates, like 

[1, 2, 4, 9, 7, 10, 8, 6, 6, 5]

Then I wanted to remove all duplicates by applying something like :

session.ids.removeAll{ //some clousure case }

I found only this:

http://groovy.codehaus.org/groovy-jdk/java/util/Collection.html

Solution

  • I am not a Groovy person , but I believe you can do something like this :

    [1, 2, 4, 9, 7, 10, 8, 6, 6, 5].unique { a, b -> a <=> b }

    Have you tried session.ids.unique() ?