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Swift and mutating struct
...e and immutable. If you assign a struct value to an immutable storage (we call it let or constant in Swift) the value becomes immutable mode, and you cannot change any state in the value. (including calling any mutating method)
If the value is assigned to a mutable storage (we call it var or varia...
Join vs. sub-query
...
@user1735921 IMO it depends ... Generally, it's very important the readability of the code, because it is of great importance for later management of it... Let's remember the famous statement of Donald Knuth: "Premature optimization is the root of all evil (or a...
When is layoutSubviews called?
...actice and here is what I got:
init does not cause layoutSubviews to
be called (duh)
addSubview: causes
layoutSubviews to be called on the
view being added, the view it’s being
added to (target view), and all the
subviews of the target
view setFrame
intelligently calls layoutSubviews on
the vie...
Why does ~True result in -2?
...00000001
and ~1 is:
11111110
Which is -2 in Two's complement1
1 Flip all the bits, add 1 to the resulting number and interpret the result as a binary representation of the magnitude and add a negative sign (since the number begins with 1):
11111110 → 00000001 → 00000010
↑ ...
Tips for a successful AppStore submission? [closed]
...Store.
Your bundle identifier, as sascha says, should be unique and is usually your domain backwards. This needs to match the App Id you created in the Developer Portal.
The Display Name (CFBundleDisplayName) is how it appears on the home screen. One important thing I found about this is that it c...
Why do we need Abstract factory design pattern?
...
All of these examples describe the Factory Method Pattern, because all of them return a single product interface. None of these is an Abstract Factory Pattern, because none of them produce a family of related product interfac...
How to make button look like a link?
...
If you don't want all buttons to be styled as links, scope the style with something like button.link {...styles...} then <button class="link">Your button</button>. This also avoids using !important which is always a good idea.
...
How to revert multiple git commits?
...e git checkout -f A -- . Will not delete these, you will have to do it manually. I applied this strategy now, thanks Jakub
– oma
Mar 31 '11 at 14:56
18
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Difference between shadowing and overriding in C#?
...dow
public override int Bar() {return 1;} //override
}
then when you call this:
A clA = new A();
B clB = new B();
Console.WriteLine(clA.Foo()); // output 5
Console.WriteLine(clA.Bar()); // output 5
Console.WriteLine(clB.Foo()); // output 1
Console.WriteLine(clB.Bar()); // output 1
//now let'...
What is data oriented design?
...
First of all, don't confuse this with data driven design.
My understanding of Data Oriented Design is that it is about organizing your data for efficient processing. Especially with respect to cache misses etc. Data Driven Design on ...