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How to simplify a null-safe compareTo() implementation?
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This does not work for Collections.sort(Arrays.asList(null, val1, null, val2, null)) as it will try to call compareTo() on a null object. It looks like a problem with the collections framework to be honest, trying to figure out ho...
Difference between Hive internal tables and external tables?
...only drops the meta data. That means hive is ignorant of that data now. It does not touch the data itself.
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How to terminate a Python script
...e under windows, for example), and it definitely is less friendly since it doesn't let the interpreter do any cleanup before the process dies. On the other hand, it does kill the entire process, including all running threads, while sys.exit() (as it says in the docs) only exits if called from the m...
Difference between HashSet and HashMap?
Apart from the fact that HashSet does not allow duplicate values, what is the difference between HashMap and HashSet ?
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Why does the lock object have to be static?
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It doesn't have to be static, in fact sometimes it should not be static.
The variable should live in the same scope as the methods where you use it for locking. If the methods are static, the variable should be static, and if t...
Does ARC support dispatch queues?
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You need to use dispatch_retain and dispatch_release on your queue. ARC does not manage them.
If your deployment target is iOS 6.0 or Mac OS X 10.8 or later
ARC will manage your queue for you. You do not need to (and cannot) use dispatch_retain or dispatch_release if ARC is enabled.
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How to scroll HTML page to given anchor?
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That doesn't actually scroll though, it just jumps. At that point you might as well just link to the anchor <a href="#anchorName">link</a>
– Ryan
Feb 7 '14 at 22:32
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How to 'minify' Javascript code
...operly a bad code.
In this example i just wanna show how much a minifier does.
What you should do before you minify
And regarding jQuery... i don't use jQuery.jQuery is for old browsers,it was made for compatibility reasons .. check caniuse.com, almost everything works on every browser (also ie1...
How does the socket API accept() function work?
...ferent clients. As to how they're implemented, the answer is either a.) it doesn't matter, the purpose of the sockets API is precisely that the implementation shouldn't matter or b.) just have a look. Apart from the highly recommended Stevens books providing a detailed description of one implementat...
Can a CSV file have a comment?
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The CSV "standard" (such as it is) does not dictate how comments should be handled, no, it's up to the application to establish a convention and stick with it.
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