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Overload Joiner.join with a function parameter

See original GitHub issue

Currently when calling Joiner.on(String).join(Iterable<E>) the toString() method is called to get a String from the given Object. Sometimes you want to use getName() or getText() in order to get a String instead… To achieve this the join method could be overloaded accepting a java.util.function.Fuction<T,R> parameter, with T being the generic type of the given Iterable Object, and R being a String. This way the developer could choose how he wants to get a string from the object.

Issue Analytics

State:
Created 7 years ago
Comments:7 (4 by maintainers)

Top GitHub Comments

1reaction

cpovirkcommented, Jun 4, 2016

We have a way of doing this, but it requires a slightly different approach:

FluentIterable.from(...).transform(...).join(joiner)

Maybe we should document this pattern on Joiner.

0reactions

cpovirkcommented, Jun 4, 2016

Thanks, Louis. I filed https://github.com/google/guava/issues/2497 for the possible doc change.

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