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Reading a delimited string into an array in Bash
...ssociated with "glob".
Wildcards (*,? and []) will be expanded to matching filenames.
The correct solution is only slightly more complex:
IFS=' ' read -a arr <<< "$line"
No globbing problem; the split character is set in $IFS, variables quoted.
...
Tmux vs. iTerm2 split panes
... What's nice about it is that you can run a command in Vim to compile your files, run unit tests, etc. without every leaving Vim, but you see the command run in the other tmux pane.
Apologies for not being a complete answer, but hopefully it helps point you in the right direction.
LINK: http://jos...
How can you undo the last git add?
...e last staged (not committed) change in git ? Suppose there were a lot of files in the current branch, some staged, some not. At some point, some foolish programmer accidentally executed:
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Handling file renames in git
I'd read that when renaming files in git , you should commit any changes, perform your rename and then stage your renamed file. Git will recognise the file from the contents, rather than seeing it as a new untracked file, and keep the change history.
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Pandas percentage of total with groupby
...te the percentage in a simpler way -- just groupby the state_office and divide the sales column by its sum. Copying the beginning of Paul H's answer:
# From Paul H
import numpy as np
import pandas as pd
np.random.seed(0)
df = pd.DataFrame({'state': ['CA', 'WA', 'CO', 'AZ'] * 3,
'...
How does the compilation/linking process work?
...ves three steps:
Preprocessing: the preprocessor takes a C++ source code file and deals with the #includes, #defines and other preprocessor directives. The output of this step is a "pure" C++ file without pre-processor directives.
Compilation: the compiler takes the pre-processor's output and prod...
diff to output only the file names
...ommand that will recursively compare two directories and output only the file names of what is different. This includes anything that is present in one directory and not the other or vice versa, and text differences.
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Unzipping files in Python
I read through the zipfile documentation , but couldn't understand how to unzip a file, only how to zip a file. How do I unzip all the contents of a zip file into the same directory?
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How can I check file size in Python?
...am writing a Python script in Windows. I want to do something based on the file size. For example, if the size is greater than 0, I will send an email to somebody, otherwise continue to other things.
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Update a table using JOIN in SQL Server?
...umn to the aggregate of another column (which violates the principle of avoiding storing redundant data), you can use a CTE (common table expression) - see here and here for more details:
;WITH t2 AS
(
SELECT [key], CalculatedColumn = SUM(some_column)
FROM dbo.table2
GROUP BY [key]
)
UPDA...