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What does yield mean in PHP?
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The heart of a generator function is the yield keyword. In its simplest form, a yield statement looks much like a return statement, except that instead of stopping execution of the function and returning, yield instead provides a value to the code looping over the generator and pauses execution o...
How to use JavaScript source maps (.map files)?
...ASS or LESS file and compile it to CSS, it looks nothing like its original form. If you enable sourcemaps, then you can see the original state of the file, instead of the modified state.
So, to answer you questions in order:
What is it for? To de-reference uglified code
How can a developer use it? ...
How to avoid reinstalling packages when building Docker image for Python projects?
.../requirements.txt
---> 968a7c3a4483
Removing intermediate container 5f4e01f290fd
Step 3 : RUN pip install -r requirements.txt
---> Running in 08188205e92b
Downloading/unpacking pytest==2.3.4 (from -r requirements.txt (line 1))
Running setup.py (path:/tmp/pip_build_root/pytest/setup.py) egg_i...
CSS: center element within a element
...ally?
– Gman Smith
Jan 17 '16 at 19:01
@GmanSmith you can use display: table-cell or flexbox for this. Have a look to ...
How can I read command line parameters from an R script?
...et R_Script="C:\Program Files\R-3.0.2\bin\RScript.exe"
%R_Script% exmpl.R 2010-01-28 example 100 > exmpl.batch 2>&1
Alternatively, using Rterm.exe:
set R_TERM="C:\Program Files\R-3.0.2\bin\i386\Rterm.exe"
%R_TERM% --no-restore --no-save --args 2010-01-28 example 100 < exmpl.R > ex...
How do I get logs/details of ansible-playbook module executions?
...re are other modules besides the debug module if you want the output to be formatted differently. There's json, yaml, unixy, dense, minimal, etc. (full list).
For example, with stdout_callback = yaml, the output will look something like this:
TASK [Say Hello] **********************************
cha...
Asynchronous vs synchronous execution, what does it really mean? [closed]
... The quicksort routine, for example, splits the list into two lists and performs a quicksort on each of them, calling itself (quicksort) recursively. In both of the above examples, the two tasks can (and often were) executed asynchronously. They do not need to be on separate threads. Even a machine...
Look up all descendants of a class in Ruby
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– Douglas Squirrel
Mar 6 '10 at 20:01
1
singleton_class instead of Class make it much faster (se...
Get the latest record from mongodb collection
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Which method performs better: .Any() vs .Count() > 0?
...t as clear as someCollection.Any() and has the added benefit of greater performance and of not requiring LINQ. Granted, this is a very simple case and other constructs using LINQ operators will convey the developers intent much clearer than the equivalent non-LINQ option.
– Cra...