9. Bash tricks

   Sommaire

   • 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.

   read more

10. 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 …

    read more

11. Python tricks

    Sommaire

    • 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 …

    read more

12. 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 …

    read more

13. VSCode tips

    Sommaire

    • 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
    }
    

    read more

14. 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 …

    read more

15. Timeout a function in python

    You can use signals and a context manager to acheive this. The idea is to register a function that will raise an exeption when the alarm signal is received and schedule the alarm signal for the timeout.

    import signal
    from contextlib import contextmanager
    
    
    @contextmanager
    def timeout(time):
        # Register a function …

    read more

16. Some tips for django

    Sommaire

    • View last executed query
    • Logging
      • Queries
    • Migrations
      • Checks
      • Fake all pending migrations
    • Model proxies
    • Easily increment migrations numbers
    • Create a widget with custom display
    • Use a nginx reverse proxy in dev
    • Checking PO files
    • Testing
      • Inserting pytest fixtures in a test case
      • Reset PK sequence
      • Reset factoryboy sequence

    View …

    read more

17. JavaScript tips

    Sommaire

    • Normalize an UTF-8 string

    Normalize an UTF-8 string

    Rely on String.prototype.normalize().

    const str = "Crème Brulée"
    str.normalize('NFD').replace(/[\u0300-\u036f]/g, "")
    > 'Creme Brulee'
    

    Source: https://stackoverflow.com/questions/990904/remove-accents-diacritics-in-a-string-in-javascript/37511463#37511463

    read more

18. PostgreSQL tips

    Sommaire

    • Update fields in JSONB format
    • CSV export/import
    • Update rows in bulks
    • Understand lock issues
    • Use variables in query
    • Database sizes

    Update fields in JSONB format

    Use the jsonb_set(COLUMN_NAME, PATH_TO_CHANGE, VALUE) function. The value must be a valid value in JSON (ie use '500' for numbers, 'true' for …

    read more

⇇ « Page 2 / 6 » ⇉