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Why does Hibernate require no argument constructor?
...(See the link for details.) Hibernate's designers surely chose to maintain compatibility with all VMs and so avoids such tricks, and uses the officially supported reflection method Class<T>.newInstance() requiring a no-arg constructor.
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What is getattr() exactly and how do I use it?
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getattr(object, 'x') is completely equivalent to object.x.
There are only two cases where getattr can be useful.
you can't write object.x, because you don't know in advance which attribute you want (it comes from a string). Very useful for meta...
How can I check if a program exists from a Bash script?
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Answer
POSIX compatible:
command -v <the_command>
Example use:
if ! command -v COMMAND &> /dev/null
then
echo "COMMAND could not be found"
exit
fi
For Bash specific environments:
hash <the_command> # For regul...
What is the Java string pool and how is “s” different from new String(“s”)? [duplicate]
...JVM's particular implementation of the concept of string interning:
In computer science, string interning
is a method of storing only one copy
of each distinct string value, which
must be immutable. Interning strings
makes some string processing tasks
more time- or space-efficient at t...
Java generics T vs Object
...o = (Foo) my.doSomething(foo);
Two advantages:
no need of casting (the compiler hides this from you)
compile time safety that works. If the Object version is used, you won't be sure that the method always returns Foo. If it returns Bar, you'll have a ClassCastException, at runtime.
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How to detect first time app launch on an iPhone
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@H2CO3 - isn't NSUserDefaults a common place? what if another application uses the same "key" that i'm using?
– Ziv Levy
Dec 15 '13 at 21:47
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How to check visibility of software keyboard in Android?
...ces().getDisplayMetrics();
return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, valueInDp, metrics);
}
Easy!
Note:
Your application must set this flag in Android Manifest android:windowSoftInputMode="adjustResize" otherwise above solution will not work.
ORIGINAL ANSWER
Yes it's pos...
What is the difference between a reference type and value type in c#?
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Removing duplicate rows from table in Oracle
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