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How to link Docker services across hosts?
...t Swarm doesn't yet work with volumes at a fixed location very well (or at least the process of linking them is not very intuitive), so this is something to keep in mind.
Swarm is now in beta phase.
Until recently, the Ambassador Pattern was the only Docker-native approach to remote-host servi...
Detach many subdirectories into a new, separate Git repository
...my-desired-repo
cd my-desired-repo
git init
And you will need to make at least one commit. If the following three lines should be skipped, your first repo will appear immediate under your repo's root:
touch a_file_and_make_a_commit # see user's feedback
git add a_file_and_make_a_commit
git commit...
When do we have to use copy constructors?
...depends on what copy constructors are available for the sub-objects. If at least one sub-object doesn't have a real copy constructor (taking the source object by constant reference) but instead has a mutating copy-constructor (taking the source object by non-constant reference) then the compiler wil...
Why does document.querySelectorAll return a StaticNodeList rather than a real Array?
...rty of type unsigned long because they believe every implementation can at least support that, but they won't say explicitly that the [] index operator should be overloaded to support getting positional elements, because they don't want to stymie some poor little language that comes along that wants...
ExecJS::RuntimeError on Windows trying to follow rubytutorial
...t still returned an empty string. I removed \\U from the command - this at least returned text, but it was in the wrong encoding - in the browser it displayed as Chinese characters.
According to this MSDN blog post, using the //U flag and redirecting to a file causes cscript to return the result us...
What are C++ functors and their uses?
...ject can not be swapped with other function object type during runtime (at least unless it extends some base class, which therefore gives some overhead)
Used instead of virtual function:
Features:
Function object (non-virtual) doesn't require vtable and runtime dispatching, thus it is more ef...
Rails formatting date
...(Year, Month, Day):
%Y - Year with century (can be negative, 4 digits at least)
-0001, 0000, 1995, 2009, 14292, etc.
%C - year / 100 (round down. 20 in 2009)
%y - year % 100 (00..99)
%m - Month of the year, zero-padded (01..12)
%_m blank-padded ( 1..12)
%-m ...
How to use timeit module
...sy with other tasks. All the timings are noisy -- the fastest time is the least noisy. It is easy to show that the fastest timings are the most reproducible and therefore the most useful when timing two different implementations.
– Raymond Hettinger
Apr 3 '12...
What does gcc's ffast-math actually do?
...es and things like auto-vectorization. In principle, GCC should perform at least as good (usually better in my experience) as MSVC. When that isn't the case, you've probably made a subtle mistake which MSVC just ignores but which causes GCC to disable an optimization. You should give both options if...
In absence of preprocessor macros, is there a way to define practical scheme specific flags at proje
...ing that I can't just call the macro straight up in the swift code, but at least now I only have one place in the project to worry about turning my debug flag on/off.
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