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The JPA hashCode() / equals() dilemma
... // this.getClass() == other.getClass()
// for the same reason. In order to support laziness PP might need to wrap
// my entity object in some kind of proxy, i.e. subclassing it.
@Override
public boolean equals(final Object obj) {
if (this == obj)
return true;...
Can you organize imports for an entire project in eclipse with a keystroke?
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C++特化模板函数的符号多重定义错误问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
C++特化模板函数的符号多重定义错误问题error LNK2005: "void __stdcall SerializeElements<class CLogEvent> ...fatal error LNK1169: 找到一个或多个多重定义的符号.我...特化模板函数SerializeElements时，报重复定义的错误，如下：
error LNK2005: "void __std...
Getting an element from a Set
...et meant that the client had different instances of that object anyway. In order to match this "copied" instance with the original one, I decided to use Java UUIDs.
So I created an abstract class UniqueItem, which automatically gives a random unique id to each instance of its subclasses.
This UUID...
What do the numbers in a version typically represent (i.e. v1.9.0.1)?
...jupiter before you stop changing the program, and since there's no obvious ordering you can't tell which is newer.
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Reload content in modal (twitter bootstrap)
...ach. I think it can even be improved using '.modal' instead of '#modal' in order to avoid hardcoding the id. In my opinion it's a cleaner approach than markz's, because you keep using the data-toggle as in original bootstrap modal.
– Toni Grimalt
Jul 30 '13 at...
What does this thread join code mean?
...hreads have terminated. In the absence of very unusual code elsewhere, the order of the joins does not matter.
– David Schwartz
Apr 19 '16 at 19:16
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Iterate over a list of files with spaces
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Seems like pointing out the obvious, but in nearly all simple cases, -exec is going to be cleaner than an explicit loop: find . -iname "foo*" -exec echo "File found: {}" \;. Plus, in many cases you can replace that last \; with+ to put lots of files in the one command.
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How can I determine whether a 2D Point is within a Polygon?
...integers. Many systems use integers for UI painting (pixels are ints after all), but macOS for example uses float for everything. macOS only knows points and a point can translate to one pixel, but depending on monitor resolution, it might translate to something else. On retina screens half a point ...
Guards vs. if-then-else vs. cases in Haskell
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This is just a matter of ordering but I think its very readable and has the same structure as guards.
nthElement :: [a] -> Int -> Maybe a
nthElement [] a = Nothing
nthElement (x:xs) a = if a < 1 then Nothing else
if ...