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iOS: Multi-line UILabel in Auto Layout
I'm having trouble trying to achieve some very basic layout behavior with Auto Layout. My view controller looks like this in IB:
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How does Google's Page Speed lossless image compression work?
When you run Google's PageSpeed plugin for Firebug/Firefox on a website it will suggest cases where an image can be losslessly compressed, and provide a link to download this smaller image.
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Why is the clone() method protected in java.lang.Object?
... declared in the Cloneable interface.
It makes the method pretty useless for taking copies of data because you cannot say:
if(a instanceof Cloneable) {
copy = ((Cloneable) a).clone();
}
I think that the design of Cloneable is now largely regarded as a mistake (citation below). I would normal...
How can I be notified when an element is added to the page?
...M Level 4 introduced MutationObserver, providing an effective replacement for the deprecated mutation events. See this answer for a better solution than the one presented here. Seriously. Don't poll the DOM every 100 milliseconds; it will waste CPU power and your users will hate you.
Since mutation...
Is there a built in function for string natural sort?
Using Python 3.x, I have a list of strings for which I would like to perform a natural alphabetical sort.
18 Answers
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How to append text to an existing file in Java?
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Are you doing this for logging purposes? If so there are several libraries for this. Two of the most popular are Log4j and Logback.
Java 7+
If you just need to do this one time, the Files class makes this easy:
try {
Files.write(Paths.ge...
Is a Java hashmap search really O(1)?
... so? Unless these hashmaps are vastly different from any of the hashing algorithms I was bought up on, there must always exist a dataset that contains collisions.
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Does python have an equivalent to Java Class.forName()?
...of the class named in that string in Python. In Java, I would use Class.forName().newInstance() . Is there an equivalent in Python?
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Hashset vs Treeset
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HashSet is much faster than TreeSet (constant-time versus log-time for most operations like add, remove and contains) but offers no ordering guarantees like TreeSet.
HashSet
the class offers constant time performance for the basic operations (add, remove, contains and size).
it does not g...
How to bundle a native library and a JNI library inside a JAR?
... single JAR file with all dependencies including the native JNI libraries for one or more platforms. The basic mechanism is to use System.load(File) to load the library instead of the typical System.loadLibrary(String) which searches the java.library.path system property. This method makes installat...