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How to create a hex dump of file containing only the hex characters without spaces in bash?
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254
xxd -p file
Or if you want it all on a single line:
xxd -p file | tr -d '\n'
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How do I redirect in expressjs while passing some context?
...at({
pathname:"/",
query: {
"a": 1,
"b": 2,
"valid":"your string here"
}
}));
});
So if you want to redirect all req query string variables you can simply do
res.redirect(url.format({
pathname:"/",
query:req.query,
});
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How can I remove the first line of a text file using bash/sed script?
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Try tail:
tail -n +2 "$FILE"
-n x: Just print the last x lines. tail -n 5 would give you the last 5 lines of the input. The + sign kind of inverts the argument and make tail print anything but the first x-1 lines. tail -n +1 would print the w...
How to normalize a NumPy array to within a certain range?
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audio /= np.max(np.abs(audio),axis=0)
image *= (255.0/image.max())
Using /= and *= allows you to eliminate an intermediate temporary array, thus saving some memory. Multiplication is less expensive than division, so
image *= 255.0/image.max() # Uses 1 division and ...
How to select rows that have current day's timestamp?
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John WooJohn Woo
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Python Script execute commands in Terminal
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201
There are several ways to do this:
A simple way is using the os module:
import os
os.system(...
How to 'insert if not exists' in MySQL?
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829
use INSERT IGNORE INTO table
see http://bogdan.org.ua/2007/10/18/mysql-insert-if-not-exists-sy...
Matplotlib (pyplot) savefig outputs blank image
...I would adjust the values I pass to plt.subplot(); maybe try values 131, 132, and 133, or values that depend whether or not T0 exists.
Second, after plt.show() is called, a new figure is created. To deal with this, you can
Call plt.savefig('tessstttyyy.png', dpi=100) before you call plt.show()
Sa...
What does [].forEach.call() do in JavaScript?
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