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How many and which are the uses of “const” in C++?
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oops, i so fail. i somehow started to write about references. thank you so much for moaning :) i'll of course remove that stuff now :)
– Johannes Schaub - litb
Mar 2 '09 at 2:12
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How does std::move() transfer values into RValues?
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We start with the move function (which I cleaned up a little bit):
template <typename T>
typename remove_reference<T>::type&& move(T&& arg)
{
return static_cast<typename remove_reference<T>...
Why does an overridden function in the derived class hide other overloads of the base class?
...decided to follow the "name hiding" specification, meaning that each class starts with a "clean sheet" with respect to each method name it declares. In order to override this behavior, an explicit action is required from the user: originally a redeclaration of inherited method(s) (currently deprecat...
Understanding reference counting with Cocoa and Objective-C
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Let's start with retain and release; autorelease is really just a special case once you understand the basic concepts.
In Cocoa, each object keeps track of how many times it is being referenced (specifically, the NSObject base c...
Refresh image with a new one at the same url
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{
var blankList, step = 0, // step: 0 - started initial load, 1 - wait before proceeding (twostage mode only), 2 - started forced reload, 3 - cancelled
iframe = window.document.createElement("iframe"), // Hidden iframe, in which to perform the load+reload.
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Common MySQL fields and their appropriate data types
... Plus it's just wrong. Someone much wiser than me told me when I was starting out that (with databasing) just because something looks like a number doesn't mean it is or should be treated as such...
– da5id
Dec 10 '08 at 1:07
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How to un-submodule a Git submodule?
...bmodule_origin git://url/to/submodule/origin
git fetch submodule_origin
# Start a fake merge (won't change any files, won't commit anything)
git merge -s ours --no-commit submodule_origin/master
# Do the same as in the first solution
git rm --cached submodule_path # delete reference to submodule H...
Reordering of commits
...her branches, rather than merging, since merges are straightforward. Let's start by manipulating branch A.
git rebase -i <SHA1 of commit a>^ branchA
The ^ means the previous commit, so this command says to rebase branch A using the commit before "a" as the base. Git will present you with a ...
Most efficient way to store thousand telephone numbers
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Additional space can be saved by observing that none of our numbers can start with e.g. 1111111(binary), because the lowest number that starts with that is 130048 and we have only five decimal digits. This allows us to shave a few entries off the first block of memory: instead of 2^m - 1 counts, ...
Sleep until a specific time/date
... then assign this expression to a value, and sleep for that many seconds:
startTime=$(date +%s)
endTime=$(date -d "next week" +%s)
timeToWait=$(($endTime- $startTime))
sleep $timeToWait
All done!
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