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Why can't Python's raw string literals end with a single backslash?
Technically, any odd number of backslashes, as described in the documentation .
12 Answers
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Should we pass a shared_ptr by reference or by value?
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I ran the code below, once with foo taking the shared_ptr by const& and again with foo taking the shared_ptr by value.
void foo(const std::shared_ptr<int>& p)
{
static int x = 0;
*p = ++x;
}
int main()
{
auto p = std::make_shared...
What is the 'pythonic' equivalent to the 'fold' function from functional programming?
...(xs):
return reduce(operator.mul, xs, 1)
Be aware that reduce is actually a foldl, in Haskell terms. There is no special syntax to perform folds, there's no builtin foldr, and actually using reduce with non-associative operators is considered bad style.
Using higher-order functions is quite p...
Revert changes to a file in a commit
...wiFissehaye : I think git checkout will only revert the changes again to fall back to the state what was in commit. I did 'git add filename ; git commit --amend' to remove the file from commit.
– ViFI
Oct 18 '16 at 18:20
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Templated check for the existence of a class member function?
... Although, I used the following for 'one' and 'two': typedef char Small; class Big{char dummy[2];} to ensure no ambiguity about platform dependent variable size.
– user23167
Nov 2 '08 at 21:40
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What exactly is a Maven Snapshot and why do we need it?
...re exists a 1.0-SNAPSHOT. That version is what might become 1.0. It's basically "1.0 under development". This might be close to a real 1.0 release, or pretty far (right after the 0.9 release, for example).
The difference between a "real" version and a snapshot version is that snapshots might get up...
Array to Hash Ruby
...ue pairs: http://www.ruby-doc.org/core-2.1.0/Array.html#method-i-to_h.
[[:foo, :bar], [1, 2]].to_h
# => {:foo => :bar, 1 => 2}
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How to remove all white space from the beginning or end of a string?
How can I remove all white space from the beginning and end of a string?
6 Answers
6
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Remove/hide a preference from the screen
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If you want something that will dynamically change the prefs for example on a SwitchPreference, I have found the best way is to put all my sub options into two category containers. Initially you'll have everything shown, then you just remove the bits you don't wan...
Tetris-ing an array
...a include the algorithm to find the longest common prefix, thus making actually using a tree structure unnecessary? Ie why check the tree for multiple children when you could detect that while building the tree. Why then a tree at all? I mean if you start with an array already. If you can change the...