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Most efficient way to increment a Map value in Java
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Now there is a shorter way with Java 8 using Map::merge.
myMap.merge(key, 1, Integer::sum)
What it does:
if key do not exists, put 1 as value
otherwise sum 1 to the value linked to key
More information here.
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Difference between @OneToMany and @ElementCollection?
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ElementCollection is a standard JPA annotation, which is now preferred over the proprietary Hibernate annotation CollectionOfElements.
It means that the collection is not a collection of entities, but a collection of simple types (Strings, etc.) or a collection of embeddable elem...
Is it necessary to explicitly remove event handlers in C#
... transfer is complete
transferService.Transfer(source, destination);
// We now have to unsusbcribe from the event
transferService.BandwidthChanged -= ui.HandleBandwidthChange;
(You'd actually want to use a finally block to make sure you don't leak the event handler.) If we didn't unsubscribe, then...
MySQL “Group By” and “Order By”
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Now if only I could do JOINS on sub-selects in VIEWS, in mysql 5.1. Maybe that feature comes in a newer release.
– IcarusNM
Jun 15 '15 at 17:52
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UITableViewCell show white background and cannot be modified on iOS7
...nton Filimonov I have set the table view cell appearance in my Appdelegate now in a particular viewController I want to have different color for cell how can I approach this Scenario? I have tried to set different color in CellWillDisplay delegate method but no effect. Could you please help me on t...
Reset C int array to zero : the fastest way?
...ould be a trap representation). But in any case, the TC is supposed to acknowledge and replace defective text, so as of 2004 we should act as if C99 always contained this text.
– M.M
May 29 '15 at 11:02
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How do I fix a merge conflict due to removal of a file in a branch?
...hen I try to merge it to master branch. There are 2 conflicts. I don't know how to resolve CONFLICT (delete/modify) . Can you please tell me what to do?
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The “backspace” escape character '\b': unexpected behavior?
...ut erasing (on your terminal):
hello worl
^
Note the cursor is now on the r. Then it outputs d, which overwrites the r and gives us:
hello wodl
^
Finally, it outputs \n, which is a non-destructive newline (again, on most terminals, including apparently yours), so the l is le...
Loop inside React JSX
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@Mark I don't know that generators are really applicable here. The key thing for this in the context of JSX is an expression that returns an array. So if you were going to use a generator somehow you'd probably spread it anyway, and it'd pr...
Can I return the 'id' field after a LINQ insert?
... making another db call? I am assuming this is pretty easy, I just don't know how.
3 Answers
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