This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
What does #synthesize window=_window do?
Question about #synthesize
Some developers tend to use this convention:
#syntheisze abc = _abc;
What is the true benefit of this? Why do they do it this way? The first thing I notice is that it makes the code a lot harder to read.
This is a common code convention:
See this Google Objective-C coding directives:
http://google-styleguide.googlecode.com/svn/trunk/objcguide.xml?showone=Properties#Properties
Related
This question already has answers here:
C-style for loop in swift 2 [duplicate]
(3 answers)
Closed 4 years ago.
I recently bought a book about Swift programming - "Swift iOS" by Abhishek Mishra. However, it seems like the code here is outdated, and I might need to figure out what the differences are between the book version and the current version. Here's an example:
for var number = 10; number < 15; number++ {
print ("The value of number is \(number)")
}
What version is used in this book and how should I go about making corrections?
Edit: I wouldn't say this is a duplicate. My question was not strictly about changes to the structure of the for loop; that was just an example. Thank you #everyone for the advice! I think I'll be going through current documentation and adding corrections on sticky notes and such. Good thing I didn't pay too much for the book (there was something wrong with the pages, which stick out at weird angles, so I got a discount, lol)
You can do something like this:
for number in 10..<15 { /// (precision) edited after #rmaddy's comment
print ("The value of number is \(number)")
}
This question already has answers here:
Swift 2.0 - Binary Operator "|" cannot be applied to two UIUserNotificationType operands
(4 answers)
Closed 7 years ago.
Can someone explain me why it shows error here. I follow the tutorial, but maybe in swift 2, it doesn't true if typing like this.
You are probably following tutorial from older version of Swift. Since its growing really fast, I suggest following the newest tutorials. In Swift 2 you should use collection, not | binary operator. Like:
[UIUserNotificationType.Sound, UIUserNotificationType.Badge]
Your problem is with the first UIUserNotificationType, which is missing (I guess) the .Alert part.
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Can I create Java-like interfaces in Perl?
How the Java like interfaces is supported in Perl?
http://en.wikipedia.org/wiki/Interface_(Java)
If you're using Moose, you could create role with nothing but a requires statement.
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
Placement of the asterisk in Objective-C
What is the differenct between the following:
(Assume we have a class calculator)
Calculator* calc;
Calculator *calc;
Also what is the need for pointers? Is it not possible to omit the star?
There is no difference between those two declarations, you could also do Calculator * calc if you're feeling adventurous.
As far as if you can omit the star, no, you cannot. It is a carry over from C and shows that calc is a pointer to a Calculator, and not a Calculator itself.
There is no difference between the 2 declaration is just an preference for typing.
Every thing on computers uses pointers. You need pointers java, c#, etc use pointers.
No is not posible to omit the star.
This question already has answers here:
Closed 12 years ago.
Possible Duplicate:
Practical uses of a Dynamic type in Scala
It has just been tweeted that Martin Odersky has just added Dynamic into trunk. Apparently, this is HUGE. Why?
Dynamic adds developer driven dynamic binding (dynamic dispatch) and gives a subset of the features of dynamic typing to Scala.
See this pastie from Jorge Ortiz:
http://pastie.org/1469174