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1. CSS tips

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   • Apply style to IE11 only

   Apply style to IE11 only

   Put the style in this media query:

   @media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
       // Put CSS here
   }
   

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2. PyCharm tips

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   • View print output immediately
   • Auto-load .env file
   • Use shell_plus in the integrated console
   • Make sure commit hooks run in a venv

   View print output immediately

   Add PYTHONUNBUFFERED=1 in run config or .env (only use .env if you use the plugin). This is meant to immediately view the output …

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3. ZSH tips

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   • ZBell

   ZBell

   Useful to have a notification when a long command completes.

   To enable it, add zbell to your plugins array if you are using oh-my-zsh or source the definition file.

   To configure:

   • The minimum time commands must take for the notification to happen, use: ZBELL_DURATION. For instance ZBELL_DURATION …

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4. Bash tricks

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   • Scripts
   • Signals

   Scripts

   Use this at the top of all your Bash scripts to avoid problems:

   # Exit on error.
   set -e
   # Don't allow undefined variable.
   set -u
   # Make pipeline fail if any command in it fail.
   set -o pipefail
   

   Signals

   See this article.

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5. Heroku tips

   Use an editor

   By default there is no editor on Heroku. To get one, you can use the heroku-nano plugin like this (or by installing as a plugin):

   mkdir bin
   cd bin
   curl https://github.com/Ehryk/heroku-nano/raw/master/heroku-nano-2.5.1/nano.tar.gz --location --silent > nano.tar …

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6. Python tricks

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   • Inspect TLS certificates with requests

   Inspect TLS certificates with requests

   Use the snippet below to capture and inspect the certificates of a distant site and its chain with requests.

   import requests
   
   HTTPResponse = requests.packages.urllib3.response.HTTPResponse
   orig_HTTPResponse__init__ = HTTPResponse.__init__
   def new_HTTPResponse__init__(self, *args, **kwargs):
       orig_HTTPResponse__init__(self, *args, **kwargs …

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7. Use dnsmasq with NetworkManager

   This will, for instance, allow you to redirect all matching domains to a certain server: dnsmasq will intercept the DNS query and return the ip you specified.

   To do this, edit NetworkManager configuration in /etc/NetworkManager/NetworkManager.conf and add in the main section dns=dnsmasq:

   [main]
   dns=dnsmasq
   

   You …

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8. VSCode tips

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   • Python
     • venv

   Python

   venv

   To use a venv with VSCode, add in the folder settings:

   {
       "python.pythonPath": "~/.virtualenvs/bureauxlocaux--Uxk5jFn/bin/python",
       "python.unitTest.pyTestEnabled": true
   }
   

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9. Deploy your source maps to Rollbar with Ansible

   I recently had to integrate Rollbar (a service to track errors) with a JS application. One nice thing about Rollbar is that if you provide it with source maps, it will point to you where the error is in the original unminified code.

   Since the application is deployed with Ansible …

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