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What is the difference between a weak reference and an unowned reference?
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Both weak and unowned references do not create a strong hold on the referred object (a.k.a. they don't increase the retain count in order to prevent ARC from deallocating the referred object).
But why two keywords? This distinction has to d...
How do I add a library project to Android Studio?
... dependency. It won’t mess in your project structure. Almost every well-known Android library is available in a Maven repository and its installation takes only one line of code in the app/build.gradle file:
dependencies {
compile 'com.jakewharton:butterknife:6.0.0'
}
Adding the library
H...
Is there a way to chain multiple value converters in XAML?
...n't getting the credit you deserved (I'd accepted my own answer!), so I've now marked your answer as accepted. Only about 9 years late... :facepalm:
– Mal Ross
Aug 27 '19 at 13:54
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Read-only and non-computed variable properties in Swift
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Right now (Swift 3.0.1) Access Control Levels changed: "fileprivate" declaration can be accessed only by code in the same source file as the declaration”. "private" declaration can be accessed only by code within the declaration...
Creating C macro with ## and __LINE__ (token concatenation with positioning macro)
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@DD: D'oh, fixed now. It needs 2 layers of indirection, not 1.
– Adam Rosenfield
Oct 20 '09 at 21:04
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Scheduling R Script
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Now there is built in option in RStudio to do this, to run scheduler first install below packages
install.packages('data.table')
install.packages('knitr')
install.packages('miniUI')
install.packages('shiny')
insta...
C# Interfaces. Implicit implementation versus Explicit implementation
...Explicit is when you define methods within your class on the interface. I know that sounds confusing but here is what I mean: IList.CopyTo would be implicitly implemented as:
public void CopyTo(Array array, int index)
{
throw new NotImplementedException();
}
and explicitly as:
void ICollecti...
What is difference between XML Schema and DTD?
... example, we actually created a simpleType called size_values which we can now use with an element:
<xs:element name="size" type="size_value">
[...]
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Why doesn't TFS get latest get the latest?
...'t correct. TFS "get latest" works exactly as advertised, as long as TFS knows about changes to the files. Get Latest only "screws up" when people go out and modify filed outside of the IDE without checking them out first. Then, TFS thinks you have the latest source on disk, and doesn't get it.
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Set environment variables on Mac OS X Lion
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Also it's useful to know about ~/.bashrc. ~/.bashrc file runs every time you open a new non-login bash shell such as xterm / aterm, and ~/.bash_profile runs only with login shells i.e when you first log in into system.
– Dan...