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Tables.computeIfAbsent

See original GitHub issue

Issue #902 requests Multitable, which we have been hesitant to add because of complexity.

When the JDK was hesitant to add even Multimap and Multiset, they added Map.computeIfAbsent, which serves many of the same use cases noticeably less well but with a significantly smaller API footprint. Perhaps we could do the same here? We could wait for Java 8 to add a true default method, or we could provide it as a static method.

Issue Analytics

State:
Created 8 years ago
Reactions:8
Comments:11 (10 by maintainers)

Top GitHub Comments

2reactions

cpovirkcommented, Sep 27, 2016

Very rough searches: ~6% of Table usages inside Google are either a Table<..., ..., List> or Table<..., ..., Set>. Compare to ~8% of Map usages with List/Set values (despite the existence of Multimap, which is itself ~13% as popular as Map).

(And of course, users may be using different workarounds – Map<R, Map<C, List<V>>, Multimap<R, Pair<C, List<V>>, or whatever.)

If anyone wants to dig deeper, I suggest a search along the lines of: \bTable<[^(=]*,\s*(List|Set)<.*>> case:yes lang:java

0reactions

kashikecommented, Apr 20, 2018

Any chance of this becoming a thing? 😺

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