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Commenting in a Bash script inside a multiline command
...f `#Another chance for a comment` \
xyz, etc.
And for pipelines specifically, there is a clean solution with no overhead:
echo abc | # Normal comment OK here
tr a-z A-Z | # Another normal comment OK here
sort | # The pipelines are automatically continued
uniq ...
^M at the end of every line in vim
...trip out the DOS line endings is to use the ff option:
:set ff=unix
:wq
Now your file is back to the good-old-Unix-way.
If you want to add the DOS line-endings (to keep a printer happy, or transfer files with Windows friends who don't have nice tools) you can go the opposite direction easily:
:...
How do I check which version of NumPy I'm using?
... is actually very nice as it allows you to check the version of numpy even if you have two different versions running on two different versions of python. py -2 -c "import numpy; print(numpy.version.version)" py -3 -c "import numpy; print(numpy.version.version)"
– JSWilson
...
how to change any data type into a string in python
...
str is meant to produce a string representation of the object's data. If you're writing your own class and you want str to work for you, add:
def __str__(self):
return "Some descriptive string"
print str(myObj) will call myObj.__str__().
repr is a similar method, which generally produce...
Remove an item from array using UnderscoreJS
...ould only iterate over array once instead of potentially twice like here.
If you want to modify the array in-place, you have to use .splice. This is also shown in the other question and undescore doesn't seem to provide any useful function for that.
...
Count character occurrences in a string in C++
.... For some reason std::count returns type iterator_traits<InputIt>::difference_type, which for most standard containers is std::ptrdiff_t, not std::size_t.
– Daniel Stevens
Apr 15 at 7:48
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Exporting functions from a DLL with dllexport
...
If you want plain C exports, use a C project not C++. C++ DLLs rely on name-mangling for all the C++isms (namespaces etc...). You can compile your code as C by going into your project settings under C/C++->Advanced, there ...
Convert base-2 binary number string to int
...n='11111111')
>>> b.uint
255
Note that the unsigned integer is different from the signed integer:
>>> b.int
-1
The bitstring module isn't a requirement, but it has lots of performant methods for turning input into and from bits into other forms, as well as manipulating them.
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Node.js - getting current filename
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for a script named script.js, you'll get script.js. If you want to have the name only without extension, as we are speaking here of a js script you can use var scriptName = path.basename(__filename, '.js'); or var scriptName = path.basename(__filename, path.extname(__filename)...
What are good uses for Python3's “Function Annotations”
... tool that organizes methods in a large class based on tags can be written if there is an official syntax.
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