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Collect vs Select [message #1858172]

Mon, 20 March 2023 00:50

Arseniy Isakov

Messages: 118
Registered: May 2012

Senior Member

Hello

Can you please. explain difference between collect operation vs select operation

Thanks
Arseniy Isakov

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Re: Collect vs Select [message #1858179 is a reply to message #1858172]

Mon, 20 March 2023 10:33

Dimitris Kolovos

Messages: 2165
Registered: July 2009
Location: York, UK

Senior Member

Hi Arseniy,

collect evaluates its expression parameter for every item of the collection it is called on and collects/returns the results, while select returns a subset of the collection it is called on that only contain elements that satisfy the parameter expression.

Please see https://www.eclipse.org/epsilon/playground/?fc2ca7e5 for a minimal example.

Thanks,
Dimitris

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