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Turning multi-line string into single comma-separated
...
You can use awk and sed:
awk -vORS=, '{ print $2 }' file.txt | sed 's/,$/\n/'
Or if you want to use a pipe:
echo "data" | awk -vORS=, '{ print $2 }' | sed 's/,$/\n/'
To break it down:
awk is great at handling data broken down into fields
-vORS=, sets the "output record separ...
How to load program reading stdin and taking parameters in gdb?
... you'd do it like this:
% gdb myprogram
gdb> run params ... < input.txt
This seems to work within emacs too.
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How do you do a simple “chmod +x” from within python?
... can also do this
>>> import os
>>> st = os.stat("hello.txt")
Current listing of file
$ ls -l hello.txt
-rw-r--r-- 1 morrison staff 17 Jan 13 2014 hello.txt
Now do this.
>>> os.chmod("hello.txt", st.st_mode | 0o111)
and you will see this in the terminal.
ls -...
javac option to compile all java files under a given directory recursively
...our project, it's easy:
# Linux / MacOS
$ find -name "*.java" > sources.txt
$ javac @sources.txt
:: Windows
> dir /s /B *.java > sources.txt
> javac @sources.txt
The advantage is that is is a quick and easy solution.
The drawback is that you have to regenerate the sources.txt file eac...
How do you read a file into a list in Python? [duplicate]
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with open('C:/path/numbers.txt') as f:
lines = f.read().splitlines()
this will give you a list of values (strings) you had in your file, with newlines stripped.
also, watch your backslashes in windows path names, as those are also escape chars i...
Can I make 'git diff' only the line numbers AND changed file names?
...orite:
git diff --name-status
Prepends file status, e.g.:
A new_file.txt
M modified_file.txt
D deleted_file.txt
2) If you want statistics, then:
git diff --stat
will show something like:
new_file.txt | 50 +
modified_file.txt | 100 +-
deleted_file | 40 -
3) Fin...
How do you append to a file in Python?
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with open("test.txt", "a") as myfile:
myfile.write("appended text")
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How to open a file using the open with statement
...gle with. You comma-separate them. Your code would then be:
def filter(txt, oldfile, newfile):
'''\
Read a list of names from a file line by line into an output file.
If a line begins with a particular name, insert a string of text
after the name before appending the line to the ...
How do I get both STDOUT and STDERR to go to the terminal and a log file?
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The Pattern
the_cmd 1> >(tee stdout.txt ) 2> >(tee stderr.txt >&2 )
This redirects both stdout and stderr separately, and it sends separate copies of stdout and stderr to the caller (which might be your terminal).
In zsh, it will not proceed to...
Renaming a virtualenv folder without breaking it
...uirements, or can get them, Make a new virtualenv:
Create a requirements.txt file
(env)$ pip freeze > requirements.txt
If you can't create the requirements.txt file, check env/lib/pythonX.X/site-packages before removing the original env.
Delete the existing (env)
deactivate && rm -...