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From "Dmitri Blinov (JIRA)" <>
Subject [jira] [Commented] (JEXL-266) Allow to remove an element from iterator collection within for-loops
Date Wed, 15 Aug 2018 07:48:00 GMT


Dmitri Blinov commented on JEXL-266:

How it is possible to overload 'forEach()' operator? The only way I see to overload the {{Interpreter.visit(ASTForeachStatement
node...)}} is to create derived classes for {{Interpreter}}, {{Engine}} to create custom version
of {{Interpreter}}, and {{JexlBuilder}} to create custom version of {{Engine}}, right?

> Allow to remove an element from iterator collection within for-loops
> --------------------------------------------------------------------
>                 Key: JEXL-266
>                 URL:
>             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|].
I whould be very grateful if this could be interesting for the community and included in master
branch. Thanks in advance!
>            Reporter: Dmitri Blinov
>            Priority: Minor
> 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
> {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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