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What is the “reactor” in Maven?
...: My New Favourite Maven Plugin.
Most of the reactor plugin features are now natively supported (since Maven 2.1.0). See Maven Tips and Tricks: Advanced Reactor Options.
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Display milliseconds in Excel
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Yay! But is there a way I can do that in the code? Now every time I run the macro, the formatting gets reset. (because I'm deleting and recreating the sheet in the macro.) Cel.EntireRow.NumberFormat = "[h]:mm:ss.000" But that just gave me "######" in the cell.
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NullPointerException in Java with no StackTrace
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There are no hidden gotchas that I know of. When you look at the Hotspot source code, you can see that this option is only used in one place (graphKit.cpp). And that looks fine to me.
– Roland Illig
Jun 13 '10 at 11:14
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What's the difference between lapply and do.call?
...he above means something like below.
list( sum( L[[1]]) , sum( L[[2]]))
Now let us do the same thing for do.call
do.call(sum, L)
It means
sum( L[[1]], L[[2]])
In our example, it returns 21. In short, lapply always returns a list while the return type of do.call really depends on the funct...
What happens if you call erase() on a map element while iterating from begin to end?
...een improved/made consistent across all container types).
The erase method now returns the next iterator.
auto pm_it = port_map.begin();
while(pm_it != port_map.end())
{
if (pm_it->second == delete_this_id)
{
pm_it = port_map.erase(pm_it);
}
else
{
++pm_it;
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Best practices for overriding isEqual: and hash
...ently be found online here. That book popularized the algorithm, which is now a default in a number of Java applications (including Eclipse). It derived, however, from an even older implementation which is variously attributed to Dan Bernstein or Chris Torek. That older algorithm originally float...
@UniqueConstraint annotation in Java
I have a Java bean. Now, I want to be sure that the field should be unique.
8 Answers
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what is the difference between const_iterator and iterator? [duplicate]
...r (or dereferencing it) will probably trigger the copy. (Some obsolete and now disallowed implementations of std::string use COW.)
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How to tell a Mockito mock object to return something different the next time it is called?
...might be run a bunch, but it's cheap.
Secondly, the way you have it right now is the correct way to get a mock to return something different depending on the test.
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Map implementation with duplicate keys
...ace Class1 and Class2 with the types you want to use for keys and values.
Now you can put them into an array or a list and iterate over them:
Pair[] pairs = new Pair[10];
...
for (Pair pair : pairs)
{
...
}
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