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From "Dmitri Blinov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (JEXL-266) Allow to remove an element from iterator collection within for-loops
Date Thu, 09 Aug 2018 11:40:00 GMT
Dmitri Blinov created JEXL-266:
----------------------------------

             Summary: Allow to remove an element from iterator collection within for-loops
                 Key: JEXL-266
                 URL: https://issues.apache.org/jira/browse/JEXL-266
             Project: Commons JEXL
          Issue Type: New Feature
    Affects Versions: 3.1
         Environment: I have created a patch as initial implementation for this new feature,
please see github pull request here [pr#5|https://github.com/apache/commons-jexl/pull/5].
I whould be very grateful if this could be interesting for the community and included in master
branch. Thanks in advance!
            Reporter: Dmitri Blinov


The for-loop in JEXL provides a convenient way to iterate over different types of collections,
however, its not possible for a script writer to utilize underlying
{code:java}
iterator.remove(){code}
method within such a loop. The proposal is to introduce new {{remove}} statement which should
be used within for-loops and should internally call {{iterator.remove()}} method and skip
the loop to the next element;

For example, the following code should remove items {{1,2,3}} from set and return value {{3}}.
{code:java}
var set = {1,2,3,4,5,6}; for (var item : set) if (item <= 3) remove; return size(set)
{code}




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