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What does `someObject.new` do in Java?
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Think of new receiver as a single token. Kind of like a function name with a space in it.
Of course, the class KnockKnockServer does not literally have a function named new receiver, but I'm guessing the syntax is meant to suggest that. It's meant to look li...
How do I check in JavaScript if a value exists at a certain array index?
...n array
}
Now, under the hood, JavaScript engines almost certainly won't allocate array space linearly and contiguously like this, as it wouldn't make much sense in a dynamic language and it would be inefficient for certain code. They're probably hash tables or some hybrid mixture of strategies, ...
Programmatically create a UIView with color gradient
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Objective-C:
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 50)];
CAGradientLayer *gradient = [CAGradientLayer layer];
gradient.frame = view.bounds;
gradient.colors = @[(id)[UIColor whiteColor].CGColor, (id)[UIColor blackColor].CGColor];
[v...
How do I set up a simple delegate to communicate between two view controllers?
...th {
ChildViewController *detailViewController = [[ChildViewController alloc] init];
// Assign self as the delegate for the child view controller
detailViewController.delegate = self;
[self.navigationController pushViewController:detailViewController animated:YES];
}
// Implement th...
How to split a string literal across multiple lines in C / Objective-C?
...the Quote idea for Objective-C:
#define NSStringMultiline(...) [[NSString alloc] initWithCString:#__VA_ARGS__ encoding:NSUTF8StringEncoding]
NSString *sql = NSStringMultiline(
SELECT name, age
FROM users
WHERE loggedin = true
);
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C/C++ maximum stack size of program
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Reserved is how much address space to allocate, committed is how much to attach backing storage to. In other words, reserving address space does not mean the memory will be there when you need it. If you never use more than 4K stack, you're not wasting real memor...
Is there a foreach in MATLAB? If so, how does it behave if the underlying data changes?
... i=[1:inf]
% do something
end
does not (because this one would require allocating infinite memory). See Loren's blog for details.
Also note that you can iterate over cell arrays.
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impro...
Where to store global constants in an iOS application?
...0 times and will only create it once. @"foo" is not the same as [[NSString alloc] initWithCString:"foo"].
– Abhi Beckert
Jul 19 '13 at 14:17
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Why do Chrome and IE put “Mozilla 5.0” in the User-Agent they send to the server? [duplicate]
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Mozilla/5.0 is the general token that says the browser is Mozilla compatible, and is common to almost every browser today.
– Pankaj Chauhan
Jul 5 '17 at 9:46
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Split string on whitespace in Python [duplicate]
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this gives me a whitespace token at the end of the line. No idea why, the original line doesn't even have that. Maybe this ignores newline?
– Gulzar
Aug 26 '15 at 14:43
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