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Why use String.Format? [duplicate]
...the exact size of the destination string is known ahead of time and can be allocated immediately and each character copied only once.
– csauve
Jan 12 '11 at 17:44
...
Nesting await in Parallel.ForEach
...l still wait for all tasks to complete, and GetPartitions will dynamically allocate elements when partition.MoveNext is called until no more elements are left to process. This means that unless you add your own mechanism for stopping the processing (e.g. CancellationToken) it won't happen on its own...
Generate a Hash from string in Javascript
... is faster, because my version has to turn the string into an array first, allocating new memory and copying every character...
– lordvlad
Feb 22 '15 at 10:04
5
...
Return all enumerables with yield return at once; without looping through
...rhead if all the client really needs is to enumerate through it, since you allocate the data structures for all elements in advance. Also, if you delegate to another method that's returning a sequence, then capturing it as a collection involves extra copying, and you do not know how many items (and ...
App store link for “rate/review this app”
...sUserReviews?type=Purple+Software&id=%@";
NSString* url = [[NSString alloc] initWithFormat: ([[UIDevice currentDevice].systemVersion floatValue] >= 7.0f) ? iOS7AppStoreURLFormat : iOSAppStoreURLFormat, cAppleID];
[[UIApplication sharedApplication] openURL: [NSURL URLWithString: url]];
}
...
java: (String[])List.toArray() gives ClassCastException
...hat type of array to create.
use
toArray(new String[v2.size()]);
which allocates the right kind of array (String[] and of the right size)
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How to edit multi-gigabyte text files? Vim doesn't work =( [closed]
...pening in gvim resulted in out of memory error when it exceeded 2GB memory allocated. When trying ctrl-c trick, it did stop loading the file into memory but only allowed to see the part of the file that gvim was able to load. So the longer I waited before pressing ctrl-c the more of the file I could...
How can I use interface as a C# generic type constraint?
...To check this we have only 1 option: decompile the class, check all member tokens that are used and if one of them is the generic type - check the arguments.
Case 3: Reflection, runtime generic construction
Example:
typeof(CtorTest<>).MakeGenericType(typeof(IMyInterface))
I suppose it's t...
If Python is interpreted, what are .pyc files?
... form (or near source, a form in which keywords were represented by 1-byte tokens, and line #'s by 2-byte binary ints, but the rest was just ASCII). So in fact a 'goto' would take different amounts of time depending on how many source lines it had to search through looking for the matching destinati...
How can I add a boolean value to a NSDictionary?
...
Try this:
NSMutableDictionary *dic = [[NSMutableDictionary alloc] init];
[dic setObject:[NSNumber numberWithBool:TRUE] forKey:@"Pratik"];
[dic setObject:[NSNumber numberWithBool:FALSE] forKey:@"Sachin"];
if ([dic[@"Pratik"] boolValue])
{
NSLog(@"Boolean is TRUE for 'Pratik'");
...