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How do I call one constructor from another in Java?
...hat you mean by "creating" - the object is "created" in that its memory is allocated and the type is set before any constructor bodies are executed. Constructors are initialization rather than creation. In particular, the type of the object is its "final" type right from the start - so if you call a...
Handling Touch Event in UILabel and hooking it up to an IBAction
...= YES;
UITapGestureRecognizer *tapGesture =
[[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(labelTap)];
[label addGestureRecognizer:tapGesture];
The trick is to enable user interaction.
...
What's the fastest algorithm for sorting a linked list?
...sort a linked list of ints. I tried with a linked list where each node was allocated with malloc() and a linked list where the nodes were laid out linearly in an array, so the cache performance would be better. I compared these with the built-in qsort, which included copying everything from a fragme...
What is the difference between lock and Mutex?
...s really a shortcut to the Monitor class, on the other hand tries to avoid allocating kernel resources and transitioning to kernel code (and is thus leaner & faster - if one has to find a WinAPI construct that it resembles, it would be CriticalSection).
The other difference is what others point...
List directory in Go
...t complete answer here. It's worth noting that there is no memory usage or allocs reported by this benchmark. It's possible the faster implementations use more memory. It's also possible that the number of CPU cores on the tester's computer hurts/helps the concurrent filepath.Walk. Furthermore, file...
What is tail call optimization?
...
Tail-call optimization is where you are able to avoid allocating a new stack frame for a function because the calling function will simply return the value that it gets from the called function. The most common use is tail-recursion, where a recursive function written to take ad...
Clean ways to write multiple 'for' loops
... 0, 0, 0, 0, 0, 0, 0, 0,
}
Also this will not work for pointers (arrays allocated in heap).
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Python: Is it bad form to raise exceptions within __init__?
...n't been properly initialized. Actually it's a very common idiom in C++ to allocate resources in the constructor and deallocate them in the destructor. You suggest that the member object destroys itself (deallocating the resources in its destructor) - then the same issue arises when writing the memb...
Freeze the top row for an html table only (Fixed Table Header Scrolling) [duplicate]
...CT pixel widths because tables are so cute in that different browsers will allocate pixels differently based on calculations and you simply CANNOT (AFAIK) guarantee that the distribution will be perfect in all cases. It becomes glaringly obvious if you have borders within your table.
I took a diffe...
How does Stack Overflow generate its SEO-friendly URLs?
... string. That is, we never want “my-slug-”. This means an extra string allocation to remove it on this edge case. I’ve worked around this by delay-hyphening. If you compare my code to Jeff’s the logic for this is easy to follow.
His approach is purely lookup based and missed a lot of charact...