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Is Meyers' implementation of the Singleton pattern thread safe?
Is the following implementation, using lazy initialization, of Singleton (Meyers' Singleton) thread safe?
6 Answers
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How to initialise memory with new operator in C++?
...allocated an array of type int with the new operator, how can I initialise them all to 0 without looping through them all myself? Should I just use memset ? Is there a “C++” way to do it?
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What does .class mean in Java?
...hat represents information about given class.
For example, if your class is Print, then Print.class is an object that represents the class Print on runtime. It is the same object that is returned by the getClass() method of any (direct) instance of Print.
Print myPrint = new Print();
System.out.p...
What's the difference between “static” and “static inline” function?
... called frequently that can make a big performance difference.
However, this is only a "hint", and the compiler may ignore it, and most compilers will try to "inline" even when the keyword is not used, as part of the optimizations, where its possible.
for example:
static int Inc(int i) {return i+...
Difference between maven scope compile and provided for JAR packaging
What is the difference between the maven scope compile and provided when artifact is built as a JAR? If it was WAR, I'd understand - the artifact would be included or not in WEB-INF/lib. But in case of a JAR it doesn't matter - dependencies aren't included. They have to be on classpath when thei...
NodeJS / Express: what is “app.use”?
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The app object is instantiated on creation of the Express server. It has a middleware stack that can be customized in app.configure()(this is now deprecated in version 4.x).
To setup your middleware, you can invoke app.use(<specific_mi...
What is dynamic programming? [closed]
What is dynamic programming ?
10 Answers
10
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Structure padding and packing
...bers would have offsets, which are mod(4) == 0 on 32-bit platform. Padding is on by default. It inserts the following "gaps" into your first structure:
struct mystruct_A {
char a;
char gap_0[3]; /* inserted by compiler: for alignment of b */
int b;
char c;
char gap_1[3]; /* -"-:...
How can I access and process nested objects, arrays or JSON?
...has only one data type which can contain multiple values: Object. An Array is a special form of object.
(Plain) Objects have the form
{key: value, key: value, ...}
Arrays have the form
[value, value, ...]
Both arrays and objects expose a key -> value structure. Keys in an array must be num...
Why is Dictionary preferred over Hashtable in C#?
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For what it's worth, a Dictionary is (conceptually) a hash table.
If you meant "why do we use the Dictionary<TKey, TValue> class instead of the Hashtable class?", then it's an easy answer: Dictionary<TKey, TValue> is a generic type, Hashtable is ...