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How to check if an NSDictionary or NSMutableDictionary contains a key?
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That's not possible. You can't add nil to a NSDictionary. You would have to use [NSNull null] instead.
– Ole Begemann
May 6 '10 at 21:39
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How do you print out a stack trace to the console/log in Cocoa?
I'd like to log the call trace during certain points, like failed assertions, or uncaught exceptions.
6 Answers
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Is char signed or unsigned by default?
In the book "Complete Reference of C" it is mentioned that char is by default unsigned.
7 Answers
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Object.watch() for all browsers?
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(Sorry for the cross-posting, but this answer I gave to a similar question works fine here)
I have created a small object.watch shim for this a while ago. It works in IE8, Safari, Chrome, Firefox, Opera, etc.
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How can I get an http response body as a string in Java?
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Every library I can think of returns a stream. You could use IOUtils.toString() from Apache Commons IO to read an InputStream into a String in one method call. E.g.:
URL url = new URL("http://www.example.com/");
URLConnection con = url.openConnection();
InputStream in = con.getInputSt...
Check if an element's content is overflowing?
...he example you can find on http://dabblet.com/gist/2462915
And an explanation you can find here: http://lea.verou.me/2012/04/background-attachment-local/.
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What is an “unwrapped value” in Swift?
I'm learning Swift for iOS 8 / OSX 10.10 by following this tutorial , and the term " unwrapped value " is used several times, as in this paragraph (under Objects and Class ):
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jQuery autocomplete tagging plug-in like StackOverflow's input tags? [closed]
What solutions accomplish the same auto-completion that SO uses for entering tags?
6 Answers
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How to create directory automatically on SD card
I'm trying to save my file to the following location
FileOutputStream fos = new FileOutputStream("/sdcard/Wallpaper/"+fileName);
but I'm getting the exception java.io.FileNotFoundException
However, when I put the path as "/sdcard/" it works.
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Is there a UIView resize event?
...ing - Apple does not guarantee KVO works on UIKit classes. Read the discussion with Apple engineer here: When does an associated object get released?
original answer:
You can use key-value observing:
[yourView addObserver:self forKeyPath:@"bounds" options:0 context:nil];
and implement:
- (void...