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Functional programming - is immutability expensive? [closed]
...The “in-place” quicksort isn’t really in-place (and quicksort is not by definition in-place). It requires additional storage in the form of stack space for the recursive step, which is in the order of O(log n) in the best case, but O(n) in the worst case.
Implementing a functional variant of q...
Why is “int i = 2147483647 + 1;” OK, but “byte b = 127 + 1;” is not compilable?
Why is int i = 2147483647 + 1; OK, but byte b = 127 + 1; is not compilable?
4 Answers
...
Python non-greedy regexes
How do I make a python regex like "(.*)" such that, given "a (b) c (d) e" python matches "b" instead of "b) c (d" ?
...
Sorting arraylist in alphabetical order (case insensitive)
...ames which contains names of people. I want to sort the arraylist in alphabetical order.
8 Answers
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Simplest/Cleanest way to implement singleton in JavaScript?
...
I think the easiest way is to declare a simple object literal:
var myInstance = {
method1: function () {
// ...
},
method2: function () {
// ...
}
};
If you want private members on your singleton instance, you can do something like this:
var myInstance ...
Rename a dictionary key
...dict[new_key] = mydict.pop(old_key)
For an OrderedDict, I think you must build an entirely new one using a comprehension.
>>> OrderedDict(zip('123', 'abc'))
OrderedDict([('1', 'a'), ('2', 'b'), ('3', 'c')])
>>> oldkey, newkey = '2', 'potato'
>>> OrderedDict((newkey if...
What is this operator in MySQL?
I'm working on code written by a previous developer and in a query it says,
9 Answers
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How does lucene index documents?
I read some document about Lucene; also I read the document in this link
( http://lucene.sourceforge.net/talks/pisa ).
4 An...
What's the syntax for mod in java
... % 2) == 0)
{
isEven = true;
}
else
{
isEven = false;
}
This can be simplified to a one-liner:
isEven = (a % 2) == 0;
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Why is the use of tuples in C++ not more common?
Why does nobody seem to use tuples in C++, either the Boost Tuple Library or the standard library for TR1? I have read a lot of C++ code, and very rarely do I see the use of tuples, but I often see lots of places where tuples would solve many problems (usually returning multiple values from functi...