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Is there a reason that Swift array assignment is inconsistent (neither a reference nor a deep copy)?
...ds to change the size of a. In particular, it never needs to do any memory allocation. Regardless of the value of i, this is a lightweight operation. If you imagine that under the hood a is a pointer, it can be a constant pointer.
The second line may be much more complicated. Depending on the value...
Why is the standard session lifetime 24 minutes (1440 seconds)?
... 2000. There's no doubt he was familiar with the PHP3 session code.
Then PHP4 came out in the year 2000 with native session support, but now the lifetime was specified in seconds.
I'll bet someone just never bothered converting minutes to seconds. It's probable that person was Sascha Schumann. ...
When to dispose CancellationTokenSource?
...ses. If the
CancellationToken's WaitHandle had been accessed (thus lazily
allocating it), Dispose will dispose of that handle. Additionally, if
the CTS was created via the CreateLinkedTokenSource method, Dispose
will unlink the CTS from the tokens it was linked to. In .NET 4.5,
Dispose has an add...
Java Replacing multiple different substring in a string at once (or in the most efficient way)
...ring> definitions ) {
// Create a buffer sufficiently large that re-allocations are minimized.
final StringBuilder sb = new StringBuilder( text.length() << 1 );
final TrieBuilder builder = Trie.builder();
builder.onlyWholeWords();
builder.removeOverlaps();
final St...
SimpleTest vs PHPunit
...
Still useful to me and my boss php4 server ^^"
– javier_domenech
Jan 22 '16 at 15:40
...
What are all the common undefined behaviours that a C++ programmer should know about? [closed]
...
Dereferencing a NULL pointer
Dereferencing a pointer returned by a "new" allocation of size zero
Using pointers to objects whose lifetime has ended (for instance, stack allocated objects or deleted objects)
Dereferencing a pointer that has not yet been definitely initialized
Performing pointer ar...
Deserializing JSON Object Array with Json.net
...
First, unnecessary memory allocation for the different types of IEnumerable implementations (3 compared to a List<Tuple>). Second, your solution implies two distinct keys - 1 for each dictionary. What happens if multiple customers have the sam...
How does the compilation/linking process work?
...volved in calculating and building any addresses.
First we laying out the allocation of memory as best we can before we can know what exactly goes in each cell. We figure out the bytes, or words, or whatever that form the instructions and literals and any data. We just start allocating memory and...
Why is arr = [] faster than arr = new Array?
...0 to 999){a[i]=i} faster than a = [];for(from 0 to 999){a[i]=i} because of allocation overhead though?
– Y. Yoshii
Dec 10 '19 at 3:51
...
What does the @ symbol represent in objective-c?
...tringWithUTF8String method." Well, not exactly. The strings are statically allocated, which makes them different from +[NSString stringWithUTF8String:] (those are dynamically allocated), and release and retain have no effect on them.
– user142019
Oct 31 '11 at ...