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Retrieve a single file from a repository
...git archive --remote=ssh://host/pathto/repo.git HEAD README.md
This will cat the contents of the file README.md.
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What is the difference between $(command) and `command` in shell programming?
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The backticks/gravemarks have been deprecated in favor of $() for command substitution because $() can easily nest within itself as in $(echo foo$(echo bar)). There are other differences such as how backslashes are parsed in the backtick/gravemark version, etc.
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Grep characters before and after match?
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grep -o -P ".{0,30}$1.{0,30}" "$2"
else
# Format was 'cat /path/to/filename | cgrep "search string"
grep -o -P ".{0,30}$1.{0,30}"
fi
} # cgrep()
Here's what it looks like in action:
$ ll /tmp/rick/scp.Mf7UdS/Mf7UdS.Source
-rw-r--r-- 1 rick rick 25780 Jul 3 19:05 /...
How do I pass an extra parameter to the callback function in Javascript .filter() method?
...g why their fat arrow function is ignoring [, thisArg], e.g. why
["DOG", "CAT", "DOG"].filter(animal => animal === this, "DOG")
returns []
it's because this inside those arrow functions are bound when the function is created and are set to the value of this in the broader encompassing scope, so...
How do I pull from a Git repository through an HTTP proxy?
...xy:
git config --global http.proxy http://proxy.mycompany:80
To authenticate with the proxy:
git config --global http.proxy http://mydomain\\myusername:mypassword@myproxyserver:8080/
(Credit goes to @EugeneKulabuhov and @JaimeReynoso for the authentication format.)
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invalid byte sequence for encoding “UTF8”
...b 1 '11 at 20:36
Mike Sherrill 'Cat Recall'Mike Sherrill 'Cat Recall'
78.5k1616 gold badges103103 silver badges156156 bronze badges
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Use CSS to automatically add 'required field' asterisk to form inputs
...e background image method. Concise though.
– Henry's Cat
Mar 1 '19 at 16:25
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How can I plot separate Pandas DataFrames as subplots?
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You may not need to use Pandas at all. Here's a matplotlib plot of cat frequencies:
x = np.linspace(0, 2*np.pi, 400)
y = np.sin(x**2)
f, axes = plt.subplots(2, 1)
for c, i in enumerate(axes):
axes[c].plot(x, y)
axes[c].set_title('cats')
plt.tight_layout()
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CSS “and” and “or”
...chart of what Internet Explorer supports: msdn.microsoft.com/en-us/library/cc351024(VS.85).aspx#selectors
– geofflee
May 9 '10 at 9:09
13
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How to echo shell commands as they are executed
...in/sh.
See the bash-hackers' wiki on set attributes, and on debugging.
$ cat shl
#!/bin/bash
DIR=/tmp/so
ls $DIR
$ bash -x shl
+ DIR=/tmp/so
+ ls /tmp/so
$
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