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Strengths of Shell Scripting compared to Python [closed]
...r of features that accrete into "shell"; not it's essential role, but it's catch-all for features. B) The python interpreter is a proper unix shell, it uses #!. C) A "simple" shell if statement often involves running the test program. The shell is a crummy programming language in all respects.
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Viewing all `git diffs` with vimdiff
... answered Apr 19 at 4:11
salty-cat-fishsalty-cat-fish
5133 bronze badges
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Sorting data based on second column of a file
...--numeric-sort compare according to string numerical value
For example:
$ cat ages.txt
Bob 12
Jane 48
Mark 3
Tashi 54
$ sort -k2 -n ages.txt
Mark 3
Bob 12
Jane 48
Tashi 54
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Loop through an array of strings in Bash?
...0
Becoming more familiar with bashes behavior:
Create a list in a file
cat <<EOF> List_entries.txt
Item1
Item 2
'Item 3'
"Item 4"
Item 7 : *
"Item 6 : * "
"Item 6 : *"
Item 8 : $PWD
'Item 8 : $PWD'
"Item 9 : $PWD"
EOF
Read the list file in to a list and display
List=$(cat List_entr...
git-checkout older revision of a file under a new name
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You can get in most cases the same output using low-level (plumbing) git cat-file command:
prompt> git cat-file blob HEAD^:main.cpp > old_main.cpp
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What is HEAD in Git?
... to the tip of the new branch.
You can see what HEAD points to by doing:
cat .git/HEAD
In my case, the output is:
$ cat .git/HEAD
ref: refs/heads/master
It is possible for HEAD to refer to a specific revision that is not associated with a branch name. This situation is called a detached HEAD....
FFmpeg: How to split video efficiently?
... you can use the following cmdl:
MP4Box -splits 716800 input.mp4
eg for concatenating two files you can use:
MP4Box -cat file1.mp4 -cat file2.mp4 output.mp4
Or if you need split by time, use -splitx StartTime:EndTime:
MP4Box -add input.mp4 -splitx 0:15 -new split.mp4
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Minimal web server using netcat
I'm trying to set up a minimal web server using netcat (nc). When the browser calls up localhost:1500, for instance, it should show the result of a function ( date in the example below, but eventually it'll be a python or c program that yields some data).
My little netcat web server needs to be a w...
find -exec cmd {} + vs | xargs
...ion. Try in empty directory: "touch -- foo\ -o\ index.html; find . | xargs cat". You'll get: "cat: invalid option -- 'o'"
– Tometzky
May 28 '09 at 7:22
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What is the fastest way to compute sin and cos together?
...even faster (by comparison) than the cycle timings that I listed might indicate.
– Stephen Canon
Apr 21 '10 at 17:22
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