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Weak and strong property setter attributes in Objective-C
...ve to manually manage CFRelease() and CFRetain() for CF objects. When you convert them back to NS objects you have to tell the compiler about the retain count so it knows what you have done.
Its all here.
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I want to get the type of a variable at runtime
...y is that you want to reify the type of the variable. That is, you want to convert the type into a value, so you can store it, pass it around, etc. This involves reflection, and you'll be using either ClassTag or a TypeTag. For example:
val x: Any = 5
import scala.reflect.ClassTag
def f[T](v: T)(im...
Shortcut to switch between design and text in Android Studio
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You can find it in Settings->KeyMap
"Select next Tab in multi-editor file" CRTL+SHIFT+RIGHT (it may depend by the platform).
You can change it.
Now you can check sequence of button in top right bar to switch between design, text and preview.
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Why is `[` better than `subset`?
...vars, drop = drop]. The problem is how to get from the unquoted subset and select arguments to something that you can validly pass to [.data.frame.
– joran
Oct 2 '17 at 21:33
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John Carmack's Unusual Fast Inverse Square Root (Quake III)
... // gives initial guess y0
x = *(float*)&i; // convert bits back to float
x = x * (1.5f - xhalf * x * x); // Newton step, repeating increases accuracy
return x;
}
In spite of this, his initial attempt a mathematically 'superior' version of id's sqrt (which came ...
Changing java platform on which netbeans runs
...n project and choosing Properties->Sources and set Source/Binary format select JDK7 among options.
– Arthur Kushman
Feb 8 '14 at 20:39
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Get all inherited classes of an abstract class [duplicate]
...d This will search all assemblies: AppDomain.CurrentDomain.GetAssemblies().SelectMany(s => s.GetTypes()).Where(....
– Brain2000
Aug 24 '18 at 20:34
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I can not find my.cnf on my windows computer [duplicate]
...ces.msc, Enter
You should find an entry like 'MySQL56', right click on it, select properties
You should see something like "D:/Program Files/MySQL/MySQL Server 5.6/bin\mysqld" --defaults-file="D:\ProgramData\MySQL\MySQL Server 5.6\my.ini" MySQL56
Full answer here:
https://stackoverflow.com/a/20136...
Compiled vs. Interpreted Languages
...r doesn't "learn" anything from having seen the line before, the effort of converting human-readable language to machine instructions is incurred every time for every line, so it's dog slow. On the bright side, the user can inspect and otherwise interact with his program in all kinds of ways: Changi...
Tags for Emacs: Relationship between etags, ebrowse, cscope, GNU Global and exuberant ctags
...t's page) cscope allows you to:
Go to the declaration of a symbol
Show a selectable list of all references to a symbol
Search for any global definition
Functions called by a function
Functions calling a function
Search for a text string
Search for a regular expression pattern
Find a file
Find all ...