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Cast an instance of a class to a @protocol in Objective-C
...ontroller <MyProtocol> *) self.myViewController;
[vc protocolMethod];
}
The UIViewController <MyProtocol> * type-cast translates to "vc is a UIViewController object that conforms to MyProtocol", whereas using id <MyProtocol> translates to "vc is an object of an unknown cl...
How to break out of a loop from inside a switch?
I'm writing some code that looks like this:
19 Answers
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Remove 'a' from legend when using aesthetics and geom_text
...ecies)) +
geom_point() +
geom_text(show.legend = FALSE)
The argument show_guide changed name to show.legend in ggplot2 2.0.0 (see release news).
Pre-ggplot2 2.0.0:
With show_guide = FALSE like so...
ggplot( data=iris, aes(x=Sepal.Length, y=Sepal.Width , colour = Species , shape = Spe...
Pushing read-only GUI properties back into ViewModel
I want to write a ViewModel that always knows the current state of some read-only dependency properties from the View.
6 An...
Preserve colouring after piping grep to grep
... simlar question in Preserve ls colouring after grep’ing but it annoys me that if you pipe colored grep output into another grep that the coloring is not preserved.
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How to use z-index in svg elements?
... the SVG specification version 1.1 the rendering order is based on the document order:
first element -> "painted" first
Reference to the SVG 1.1. Specification
3.3 Rendering Order
Elements in an SVG document fragment have an implicit drawing order, with the first elements in the SVG d...
How to keep onItemSelected from firing off on a newly instantiated Spinner?
I've thought of some less than elegant ways to solve this, but I know I must be missing something.
33 Answers
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How to make a phone call in android and come back to my activity when the call is done?
...end call' button, it does not go back to my activity. Can you please tell me how can I launch a call activity which comes back to me when 'End call' button is pressed? This is how I'm making the phone call:
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When and why are database joins expensive?
I'm doing some research into databases and I'm looking at some limitations of relational DBs.
7 Answers
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emacs/elisp: What is the hash (pound, number sign, octothorp) symbol used for?
... reason for applying # to a lone symbol is to get diagnostics at compile time if that symbol is undefined.
– ajk
Nov 28 '14 at 14:19
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