Preditates.sameAs

[gissuebot]

Original issue created by ivankoblik on 2010-04-28 at 10:33 AM

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Would be nice to have a standard predicate to do referential equality check.

Possible use case:
ImmutableSet<Object> filteredSet =
  ImmutableSet.copyOf(
    Collections2.filter(
      Predicates.not(
        Predicates.sameAs(objectToRemove)
  )));

I'm not sure how efficient it is, but it's a nifty way of "removing"
elements from immutable collections. Would be glad to learn if there's a
better way of doing it.

[gissuebot]

Original comment posted by kevinb@google.com on 2010-04-28 at 02:08 PM

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Predicates.equalTo() is what you want for this 99% of the time. We used to have a sameAs() predicate internally,
but virtually everyone who used it should have used equalTo(), so we got rid of it.

Btw, for sets you also have the option of Sets.difference(set, ImmutableSet.of(objectToRemove)) (optionally
adding .immutableCopy() to the end of that).

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Status: WontFix