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Are list-comprehensions and functional functions faster than “for loops”?
...ython function), the overhead of repeatedly setting up Python stack frames etc. eats up any savings. Simply doing the same work in-line, without function calls (e.g. a list comprehension instead of map or filter) is often slightly faster.
Suppose that in a game that I'm developing I need to draw...
How do I handle the window close event in Tkinter?
...opping this activity with destroy() -- even by using protocol(), a button, etc. -- will disturb this activity ("while executing" error) rather than just terminate it. The best solution in almost every case is to use a flag. Here is a simple, silly example of how to use it (although I am certain that...
Is using Random and OrderBy a good shuffle algorithm?
...ents[swapIndex] = tmp;
}
// Lazily yield (avoiding aliasing issues etc)
foreach (T element in elements)
{
yield return element;
}
}
EDIT: Comments on performance below reminded me that we can actually return the elements as we shuffle them:
public static IEnumerable<...
Multiple inheritance/prototypes in JavaScript
...4
<Object.prototype stuff>
so that obj.a === 1, obj.b === 3, etc.
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Which @NotNull Java annotation should I use?
...er treats everyhing (instance variables, method parameters, generic types, etc) except local variables as if they have a @NonNull type by default. Per the documentation:
The NNEL default leads to the smallest number of explicit annotations in your code.
You can set a different default for a c...
Setting default permissions for newly created files and sub-directories under a directory in Linux?
... with umask 002 or 007 or something of that nature" - that's a bit of a stretch.... How do you make Postfix, Dovecot, Clam and Spam Assassin all do this?
– jww
Apr 3 '14 at 0:18
2
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foldl versus foldr behavior with infinite lists
...step False 1) 2) [3..]
foldl step (step (step (step False 1) 2) 3) [4..]
etc.
Intuitively, foldl is always on the "outside" or on the "left" so it gets expanded first. Ad infinitum.
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How are software license keys generated?
...S to both verify your key and obtain the product-type (Home, Professional, etc.) at the same time. Additionally, it requires online activation.
The full algorithm is rather complex, but outlined nicely in this (completely legal!) paper, published in Germany.
Of course, no matter what you do, unles...
Common MySQL fields and their appropriate data types
...5) for anything guaranteed to be under 255 characters (page titles, names, etc)
TEXT for pretty much everything else.
Of course there are exceptions, but I find that covers most eventualities.
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Do I encode ampersands in ?
...ngs inside escaped things, double encoding, URL inside URL inside paramter etc,...
http://x.com/?passwordUrl=http%3A%2F%2Fy.com%2F%3Fuser%3Dtest&amp;password=&quot;&quot;123
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