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what does dollar sign mean in objective-c?
(2 answers)
Closed 9 years ago.
I'm still new to objective-c I went through a code example from git hub and saw '$' notation before parameters for example:
titleLabel.$height = TITLE_HEIGHT;
can some one explain the difference between titleLabel.$height and titleLabel.height
The property happens to include a dollar sign in its name, it has no significance.
For Example:
#property int $height;
Related
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How to avoid scientific notation for large numbers in JavaScript?
(27 answers)
Closed 2 years ago.
I am receiving data as,
{
"balance": 1e+22
}
and I want it as,
{
"balance": 10000000000000000000000
}
What should I do so that I get proper response value in Node APIs?
Solution found: How to avoid scientific notation for large numbers in JavaScript?
Code which worked as a perfect solution: BigInt(n).toString();
This question already has answers here:
Array declaration in FORTRAN for beginners
(2 answers)
Closed 6 years ago.
I am trying to understand a Fortran90 code. In the code, I found this expression for initializing a variable:
integer :: time(8)
What is meant by this? What does the parenthesis do?
That syntax declares an INTEGER rank one array of size eight.
(In Fortran terminology that source does not initialize anything and it is a declaration, not an expression.)
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Shortcuts in Objective-C to concatenate NSStrings
(30 answers)
Closed 8 years ago.
Is it possible to add on to the text of a label without changing existing text? I'm new to mac development in Xcode so any help is appreciated.
Yes and no. Basically, you replace the text with a new string that includes the old text
self.myLabel.text = [self.myLabel.text stringByAppendingString:#"more stuff"];
This question already has answers here:
Objective C - Why do constants start with k
(6 answers)
Closed 9 years ago.
I have always wondered, when you define something such as a string (or anything for that matter), why do people put a 'k' ahead of the defined name?
e.g. #define kHello = #"Hello"
What's that 'k' all about?
I'm pretty sure the 'k' is short for constant. (Don't ask me why it's a k.)
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
Caret in objective C
I just want to know what this ^ symbol means in Objective-C.
It can mean several things:
type (^name)(arguments)
is a declaration of a block object.
^(arguments) { ... }
is a block object literal
x ^ y
is the bitwise XOR operator
It is used to define blocks in later versions of iOS. See http://developer.apple.com/library/ios/#documentation/cocoa/Conceptual/Blocks/Articles/00_Introduction.html
It means a couple of things:
It can mean bitwise XOR.
It can also signify a pointer to a block (just like * is marks a pointer to a function).