Beware of Collection.retainAll in Java! – What I learned today!



Beware of Collection.retainAll in Java! – What I learned today!

Yesterday I got a nasty bug! Basically, I observed that a map – which was populated with about 20 values (no significance of particular number here) on first access (in a static manner) – was missing most of those values when accessed later. Begun the debugging.. and finally the culprit was caught.


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