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Storing a Map using JPA
...tCollection annotation that you can use in conjunction with the support of java.util.Map collections.
Something like this should work:
@Entity
public class Example {
@Id long id;
// ....
@ElementCollection
@MapKeyColumn(name="name")
@Column(name="value")
@CollectionTable(na...
Is JavaScript a pass-by-reference or pass-by-value language?
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It's interesting in JavaScript. Consider this example:
function changeStuff(a, b, c)
{
a = a * 10;
b.item = "changed";
c = {item: "changed"};
}
var num = 10;
var obj1 = {item: "unchanged"};
var obj2 = {item: "unchanged"};
...
Xml configuration versus Annotation based configuration [closed]
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Annotation and Annotation based configuration(Java config) are two different things and the OP asks about the later while you talk about the former.
– Lucky
Jul 11 '15 at 6:59
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How to get the name of a class without the package?
...e of a type (class in this case) with or without the namespace (package in java-world).
3 Answers
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How to count the number of set bits in a 32-bit integer?
...for a particular language (e.g. using uint32_t for C++ and >>> in Java):
int numberOfSetBits(uint32_t i)
{
// Java: use int, and use >>> instead of >>
// C or C++: use uint32_t
i = i - ((i >> 1) & 0x55555555);
i = (i & 0x33333333) + ((i >&...
PHP ORMs: Doctrine vs. Propel
...handle persistence logic. When released it will bear closer resemblance to Java's Hibernate (Doctrine 1 is more like Rails' ActiveRecord).
I've been developing with the alpha release of Doctrine 2, and must say it is heads and shoulders above Doctrine 1 (just my opinion, and I've never used Propel)...
D Programming Language in the real world? [closed]
...e error messages when you screw up just to use resizable arrays.
Unlike Java and other bondage-and-discipline languages, D assumes that sometimes pointers, unsafe casts, manual memory management, etc. are a necessary evil, and assumes you're smart enough to handle real templates, operator overloa...
Handling specific errors in JavaScript (think exceptions)
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Well Microsoft's C# certainly handles errors better than Javascript :P. Mozzilla added something like it to Firefox that's like that. Though it's not in the Ecmascript standard, not even ES6, but they also explain how to make it conform, though it's not as succint. Basically same a...
What are bitwise shift (bit-shift) operators and how do they work?
I've been attempting to learn C in my spare time, and other languages (C#, Java, etc.) have the same concept (and often the same operators) ...
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Remove folder and its contents from git/GitHub's history
...--bare https://project/repository project-repository
cd project-repository
java -jar bfg.jar --delete-folders DIRECTORY_NAME # i.e. 'node_modules' in other examples
git reflog expire --expire=now --all && git gc --prune=now --aggressive
git push --mirror https://project/new-repository
If ...