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What is the global interpreter lock (GIL) in CPython?
...ntly as possible. If you have a "global lock" which you need to acquire in order to (say) call a function, that can end up as a bottleneck. You can wind up not getting much benefit from having multiple threads in the first place.
To put it into a real world analogy: imagine 100 developers working a...
How to sort an array in Bash
...t's happening:
The result is a culmination six things that happen in this order:
IFS=$'\n'
"${array[*]}"
<<<
sort
sorted=($(...))
unset IFS
First, the IFS=$'\n'
This is an important part of our operation that affects the outcome of 2 and 5 in the following way:
Given:
"${array[*]}...
What is the difference between '@' and '=' in directive scope in AngularJS?
...s. For example if the method is hello(name) in parent scope, then in
order to execute the method from inside your directive, you must
call $scope.hello({name:'world'})
I find that it's easier to remember these differences by referring to the scope bindings by a shorter description:
...
How do you include additional files using VS2010 web deployment packages?
...f you are comfortable with MSBuild, and if you are not then read this. In order to do this we need to hook into the part of the process that collects the files for packaging. The target we need to extend is called CopyAllFilesToSingleFolder. This target has a dependency property, PipelinePreDeployC...
How can I push a local Git branch to a remote with a different name easily?
...o the question, is already set. He needs to set push.default to upstrem in order to get push to respect the upstream setting, since by default only pull does.
– Brian Campbell
Apr 21 '11 at 5:47
...
Calculate the median of a billion numbers
...ion first[*]. It writes its data back to the control machine in increasing order as soon as it can (using asynchronous IO so as to continue sorting, and probably with Nagle on: experiment a bit).
The control machine performs a 99-way merge on the data as it arrives, but discards the merged data, ju...
Random float number generation
...ften done like this:
srand (static_cast <unsigned> (time(0)));
In order to call rand or srand you must #include <cstdlib>.
In order to call time, you must #include <ctime>.
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What is non-blocking or asynchronous I/O in Node.js?
...to memory and processing time for a thread that isn't doing anything.
In order to cater other requests while that thread has stalled depends on your software. What most server software do is spawn more threads to cater the additional requests. This requires more memory consumed and more processing...
How to get the number of days of difference between two dates on mysql?
...iff(DAY, '2016-04-13 11:00:01', '2016-04-14 11:00:00');
(note the opposite order of arguments compared to datediff).
Some examples:
select timestampdiff(DAY, '2016-04-13 11:00:01', '2016-04-14 11:00:00');
returns 0
select timestampdiff(DAY, '2016-04-13 11:00:00', '2016-04-14 11:00:00');
returns 1
s...
Why #define TRUE (1==1) in a C boolean macro instead of simply as 1?
...ent to 0 and 1.
(note that removing the parentheses will break that due to order of operations)
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