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Extract substring in Bash
Given a filename in the form someletters_12345_moreleters.ext , I want to extract the 5 digits and put them into a variable.
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How to call a function from a string stored in a variable?
...see my answer below if you are dealing with classes and methods. I didn't expect what I found.
– Chris K
Jan 28 '13 at 23:16
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Fatal error in launcher: Unable to create process using “”C:\Program Files (x86)\Python33\python.exe
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it seems that
python -m pip install XXX
will work anyway (worked for me)
(see link by user474491)
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Exporting functions from a DLL with dllexport
I'd like a simple example of exporting a function from a C++ Windows DLL.
4 Answers
4
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Label under image in UIButton
I'm trying to create a button which has some text beneath the icon (sorta like the app buttons) however it seems to be quite difficult to achieve. Any ideas how can I go about get the text to display below the image with a UIButton ?
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Difference between del, remove and pop on lists
...t from a list:
remove removes the first matching value, not a specific index:
>>> a = [0, 2, 3, 2]
>>> a.remove(2)
>>> a
[0, 3, 2]
del removes the item at a specific index:
>>> a = [9, 8, 7, 6]
>>> del a[1]
>>> a
[9, 7, 6]
and pop removes the i...
Node.js get file extension
Im creating a file upload function in node.js with express 3.
13 Answers
13
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How to ignore the first line of data when processing CSV data?
... file and detect whether a header row is present along with the built-in next() function to skip over the first row only when necessary:
import csv
with open('all16.csv', 'r', newline='') as file:
has_header = csv.Sniffer().has_header(file.read(1024))
file.seek(0) # Rewind.
reader = c...
Is there a Unix utility to prepend timestamps to stdin?
...his in Python, but I was wondering if there was a utility you could feed text into which would prepend each line with some text -- in my specific case, a timestamp. Ideally, the use would be something like:
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how to show lines in common (reverse diff)?
I have a series of text files for which I'd like to know the lines in common rather than the lines which are different between them. Command line unix or windows is fine.
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