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Static Vs. Dynamic Binding in Java
...object. e.g. [speak(), speak(String) Class object]
A pointer to the memory allocated on the heap for that object’s data e.g. values of instance variables.
So all object references indirectly hold a reference to a table which holds all the method references of that object. Java has borrowed this ...
What's the meaning of interface{}?
...dicated to holding the value in the interface structure, so the assignment allocates a chunk of memory on the heap and records the pointer in the one-word slot.
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What are major differences between C# and Java?
...llows the definition of "structs", which are similar to classes but may be allocated on the stack (unlike instances of classes in C# and Java).
• C# implements properties as part of the language syntax.
• C# allows switch statements to operate on strings.
• C# allows anonymous methods...
Difference between Select and ConvertAll in C#
... Difference between ConvertAll and Select is ConvertAll will allocate the size of the list before hand. For a large sequence this will make a performance difference. Thus, if performance is your aim, use ConvertAll. If performance is not a concern, use Select as it's more idiomatic in ...
Optimal number of threads per core
...er things out of your control. But that's the main idea. Some OSes let you allocate processors so only your application has access/usage of said processor!
From my own experience, if you have a lot of I/O, multiple threads is good. If you have very heavy memory intensive work (read source 1, read s...
Check if a string contains a string in C++
... which is expensive, particularly for longer strings that necessitate heap allocations. Further, say you call CheckSubstring("XYZab", "ab\0\0") - the while loop will end up comparing a to a, b to b, the implicit NUL at the end of the first string to the explicit NUL in the second, then it will read...
How to add a new row to an empty numpy array
... sometimes you cannot guess the dimensions, it's life. However you can allocate a big enough array and give values to its views. I do not like it though, because there are unwanted values that one has to find a way to "mask". This idea of masking really does not fit my taste.
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On localhost, how do I pick a free port number?
...h 65535). The main thing if you have a variable number of listeners is to allocate a range to your app - say 20000-21000, and CATCH EXCEPTIONS. That is how you will know if a port is unusable (used by another process, in other words) on your computer.
However, in your case, you shouldn't have a...
How to calculate time in hours between two dates in iOS
...ate: (NSDate *) dateT {
NSMutableString *timeLeft = [[NSMutableString alloc]init];
NSDate *today10am =[NSDate date];
NSInteger seconds = [today10am timeIntervalSinceDate:dateT];
NSInteger days = (int) (floor(seconds / (3600 * 24)));
if(days) seconds -= days * 3600 * 24;
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When to use references vs. pointers
...pret at first sight.
Imho, references are as good as pointers when no (re)allocation nor rebinding (in the sense explained before) is needed. Moreover, if a developer only uses pointers for arrays, functions signatures are somewhat less ambiguous. Not to mention the fact that operators syntax is wa...