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Cast an instance of a class to a @protocol in Objective-C
...ight or might not care about the object type, it depends on the situation. What happens if you want to send a message declared on UIViewController to vc in the example in my answer, and it's declared as id <MyProtocol>?
– Nick Forge
Dec 1 '13 at 15:41
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Should I add .vcxproj.filter files to source control?
... when we translated to the .vcxproj MSBuild format.
One reason is exactly what you pointed out, that the filters are purely a logical view, and different team members may want different views.
The other is that sometimes the build is set up to check the timestamp of the project file, and trigger a...
How can I check if the current date/time is past a set date/time?
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What if we have already a DateTime object and we want to know if this is past as we cannot pass an object to DateTime constructor as you suggested? should we use its getTimestamp() and compare it with time()? @Salman A
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How to make pipes work with Runtime.exec()?
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@Kaj What if you wanted to add options to ls i.e. ls -lrt ?
– kaustav datta
May 6 '13 at 6:25
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Remove 'a' from legend when using aesthetics and geom_text
...s arguments, rather than replace with it the existing arguments - which is what Simon's solution shows. For a ggplot2 noob like me this was not that obvious. A proper example would have used the OP's code and just added the missing argument like this:
..
geom_text(aes(label=Species), show_guide = F...
Is element block level or inline level?
... in the HTML or CSS specs specify that images are inline. So regardless of what the browser says it is, images are treated exactly like they were set to display:inline-block.
– DisgruntledGoat
Dec 28 '15 at 14:47
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Which one will execute faster, if (flag==0) or if (0==flag)?
...room for a nice discussion on compiler optimization :)
The answer is:
What is flag's type?
In the case where flag actually is a user-defined type. Then it depends on which overload of operator== is selected. Of course it can seem stupid that they would not be symmetric, but it's certainly all...
iTerm 2: How to set keyboard shortcuts to jump to beginning/end of line?
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Do you know what the code/sequence for Command+Delete is? (clear out the prompt)
– Steven Lu
Mar 31 '13 at 18:37
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Difference between $(document.body) and $('body')
...ody', the jQuery selector engine has to interpret the string to figure out what element(s) it refers to.
In practice either will get the job done.
If you are interested, there is more information in the documentation for the jQuery function.
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CSS performance relative to translateZ(0)
...e likely to get screwed with.
If you take a look at this demo, you'll see what I mean. The second div has a transformation applied to it, meaning that it creates a new stacking context, and the pseudo elements are stacked on top rather than below.
So basically, don't do that. Apply a 3D transforma...