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Difference between FetchType LAZY and EAGER in Java Persistence API?
...t; students;
// setters and getters
}
Now when you load a University from the database, JPA loads its id, name, and address fields for you. But you have two options for how students should be loaded:
To load it together with the rest of the fields (i.e. eagerly), or
To load it on-demand (i...
What is the difference between the HashMap and Map objects in Java?
...ce restricts you to only those methods unless you cast the collection back from Map to HashMap (which COMPLETELY defeats the purpose).
Often what you will do is create an object and fill it in using it's specific type (HashMap), in some kind of "create" or "initialize" method, but that method will ...
How to push both value and key into PHP array
...n the 2 arrays contain values on the same key + operator ignores the value from second array (does not override), also it does not renumber/reindex the numeric keys...
– jave.web
Feb 16 '17 at 21:35
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Merging 2 branches together in GIT
...B
# hack hack
$ git commit -am "commit on branch B"
# create new branch C from A
$ git checkout -b C A
# hack hack
$ git commit -am "commit on branch C"
# go back to branch A
$ git checkout A
# hack hack
$ git commit -am "commit on branch A"
so now there are three separate branches (namely A B a...
Convert Decimal to Double
...casts, while C# has both implicit and explicit ones.
In C# the conversion from decimal to double is explicit as you lose accuracy. For instance 1.1 can't be accurately expressed as a double, but can as a decimal (see "Floating point numbers - more inaccurate than you think" for the reason why).
In...
Archive the artifacts in Jenkins
...688 No, I'm referring to per-project target folders. If you want artifacts from several jobs into a single shared folder, you will have to publish the artifacts using for example one of the "Publish over $PROTOCOL" plugins.
– Anders Lindahl
Mar 8 '18 at 21:33
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Update data in ListFragment as part of ViewPager
...ng screens.Even i was able to change content of FragmentA using MyActivity from FragmentB,using this solution.
– Mehdi Fanai
Apr 3 '13 at 2:34
5
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How can I output the value of an enum class in C++11
...
@NicolBolas: I copied as_integer from one of my open-source libraries, CxxReflect (see enumeration.hpp). The library uses trailing return types consistently, everywhere. For consistency.
– James McNellis
Jul 10 '12 at...
When should you use constexpr capability in C++11?
...t. Compile time evaluation is a neat optimization, but what you really get from constexpr is a guarantee of some kind of behavior. Just like const does.
– Tomáš Zato - Reinstate Monica
Mar 14 '19 at 10:09
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Are arrays in PHP copied as value or as reference to new variables, and when passed to functions?
... unnecessary copy).
function handle_array($my_array) {
// ... read from but do not modify $my_array
print_r($my_array);
// ... $my_array effectively passed by reference since no copy is made
}
However if you modify the array, a copy of it is made first (which uses more memory but ...