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In Objective-C, how do I test the object type?
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If your object is myObject, and you want to test to see if it is an NSString, the code would be:
[myObject isKindOfClass:[NSString class]]
Likewise, if you wanted to test myObject for a UIImageView:
[myObject isKindOfClass:[UIImageView class]]
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What is the difference between an interface and abstract class?
What exactly is the difference between an interface and abstract class?
37 Answers
37
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Annotating text on individual facet in ggplot2
... edited Aug 9 '12 at 19:24
Andy
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answered Aug 9 '12 at 18:34
jor...
How to drop rows of Pandas DataFrame whose value in a certain column is NaN
I have this DataFrame and want only the records whose EPS column is not NaN :
12 Answers
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#if DEBUG vs. Conditional(“DEBUG”)
Which is better to use, and why, on a large project:
8 Answers
8
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How do I increase the scrollback buffer in a running screen session?
...with through putty. I've realized that the scrollback buffer is too small and would like to increase it without starting a new screen session.
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Step-by-step debugging with IPython
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You can use IPython's %pdb magic. Just call %pdb in IPython and when an error occurs, you're automatically dropped to ipdb. While you don't have the stepping immediately, you're in ipdb afterwards.
This makes debugging individual functions easy, as you can just load a file with %load...
What algorithm can be used for packing rectangles of different sizes into the smallest rectangle pos
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The quick and dirty first pass solution is always a great one to start with, as a comparison if nothing else.
Greedy placement from large to small.
Put the largest rectangle remaining into your packed area. If it can't fit anywhere, ...
Why is __dirname not defined in node REPL?
...irname , but from the REPL this seems to be undefined. Is this a misunderstanding on my side or where is the error?
11 Answ...
When a 'blur' event occurs, how can I find out which element focus went *to*?
...work for focus changes caused by tabbing through fields with the keyboard, and does not work at all in Chrome or Safari. The big problem with using activeElement (except in IE) is that it is not consistently updated until after the blur event has been processed, and may have no valid value at all du...