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Multi threading Python simple example

from multiprocessing import Pool def f(x): return x * x if __name__ == '__main__': with Pool(50) as p: print(p.map(f, [1, 2, 3, 2, 4, 5, 6, 7, 8, 9, 19]))
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add space between lines of text HTML CSS

Use line height - css line-height: 0.7;
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Append to a json file python

How to append to a json file python - the quick way import json your_dictionary = {'a_new_key': 'a_new_value'} with open('a_json.json') as a_file: data = json.load(a_file) data.update(your_dictionary) with open('a_json.json', 'w') as f: json.dump(data, f)
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Setup Mailhog mail server on Ubuntu

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How to setup Mailhog mail server on Ubuntu install Go (since mailhog is written in Go) sudo apt-get install golang-go mkdir gocode echo "export GOPATH=$HOME/gocode" >> ~/.profile source ~/.profile install mailhog go get github.com/mailhog/MailHog go get github.com/mailhog/mhsendmail make binaries global - replace USERNAME with your OS username sudo cp /home/USERNAME/gocode/bin/MailHog /usr/local/bin/mailhog sudo cp /home/USERNAME/gocode/bin/mhsendmail /usr/local/bin/mhsendmail install PHP sudo apt install php7.2-cli edit php.ini
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