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Remove items from one list in another
...ist in another" is certainly not equivalent to a set difference operation, and you should not misinform people by accepting this as the right answer!!!!
– user1935724
May 26 '16 at 3:58
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Can't pickle when using multiprocessing Pool.map()
... is that multiprocessing must pickle things to sling them among processes, and bound methods are not picklable. The workaround (whether you consider it "easy" or not;-) is to add the infrastructure to your program to allow such methods to be pickled, registering it with the copy_reg standard librar...
How do I fix the indentation of an entire file in Vi?
In Vim, what is the command to correct the indentation of all the lines?
16 Answers
16...
One-liner to check whether an iterator yields at least one element?
...s at first success easily: run any((x > 100 for x in xrange(10000000))) and then run any((x > 10000000 for x in xrange(100000000))) -- the second should take much longer.
– chbrown
Apr 18 '12 at 19:53
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Best way to give a variable a default value (simulate Perl ||, ||= )
... I thought Mariano was pulling our legs but nope, it's a thing <=> and pretty accurate to boot!
– HPWD
Jun 14 '18 at 23:32
1
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Why would iterating over a List be faster than indexing through it?
...use every time you are indexing it restarts from the beginning of the list and goes through every item. This means that your complexity is effectively O(N^2) just to traverse the list!
If instead I did this:
for(String s: list) {
System.out.println(s);
}
then what happens is this:
head ->...
grep a tab in UNIX
... That's very good for GNU UNIX, but what about POSIX Solaris, AIX and HP-UX? Those don't know anything about -P option.
– rook
Aug 5 '13 at 15:17
22
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What is __stdcall?
I'm learning about Win32 programming, and the WinMain prototype looks like:
8 Answers
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How do I save a String to a text file using Java?
...u would to any output stream:
out.println(text);
You'll need exception handling, as ever. Be sure to call out.close() when you've finished writing.
If you are using Java 7 or later, you can use the "try-with-resources statement" which will automatically close your PrintStream when you are done w...
How do I get a reference to the app delegate in Swift?
...off using the delegate accessible through the sharedApplication singleton. And as far as your second question goes, yes you probably want to use a constant. Even though, you may be changing the AppDelegate's properties, you probably won't be reassigning the pointer to anything else, in which case, t...