toolness

Adventures in Python Core Dumping

After watching Bryan Cantrill's presentation on [Running Aground: Debugging Docker in Production][aground] I got all excited (and strangely nostalgic) about the possibility of core-dumping server-side Python apps whenever they go awry. This would theoretically allow me to fully inspect the state of the program at the point it exploded, rather than relying solely on the information of a stack trace.

babldev

def decode_flask_cookie(secret_key, cookie_str):
    import hashlib
    from itsdangerous import URLSafeTimedSerializer
    from flask.sessions import TaggedJSONSerializer
    salt = 'cookie-session'
    serializer = TaggedJSONSerializer()
    signer_kwargs = {
        'key_derivation': 'hmac',
        'digest_method': hashlib.sha1
    }

thomasdarimont

Setup

Add this to your .profile, .bashrc, .zshrc...

decode_base64_url() {
  local len=$((${#1} % 4))
  local result="$1"
  if [ $len -eq 2 ]; then result="$1"'=='
  elif [ $len -eq 3 ]; then result="$1"'=' 
  fi
 echo "$result" | tr '_-' '/+' | openssl enc -d -base64

miguelgrinberg

import asyncio
loop = asyncio.get_event_loop()

async def hello():
    await asyncio.sleep(3)
    print('Hello!')
    
if __name__ == '__main__':
    loop.run_until_complete(hello())
    

tasdikrahman

src :

• https://joost.vunderink.net/blog/2011/12/02/irssi-tricks-navigating-around/
• https://www.linode.com/docs/applications/messaging/using-irssi-for-internet-relay-chat

Navigating while typing

Let’s start by what you can do while typing. These keystrokes change only what happens on the input line (the line where you type stuff).

arrow left/right: move one character left or right.

SheldonWangRJT

This notes is written by Sheldon. You can find me with #iOSBySheldon in Github, Youtube, Facebook, etc.

Need

Convert .mov/.MP4 to .gif

Reason

As a developer, I feel better to upload a short video when I create the pull request to show other viewers what I did in this PR. I tried .mov format directly got after finishing recording screen using Quicktime, however, gif offers preview in most web pages, and has smaller file size.

This is not limited to developer, anyone has this need can use this method to convert the files.

ibraheem4

Installing Postgres via Brew

Pre-Reqs

Brew Package Manager

In your command-line run the following commands:

1. brew doctor
2. brew update

StefanoF

(function(){
  let arr = document.getElementsByTagName("a");
  let arrL = arr.length;
  for(let i=0; i<arrL; i++){
    arr[i].removeAttribute("data-lynx-uri");
  }
})();

coolreader18

class E(BaseException):
    def __new__(cls, *args, **kwargs):
        return cls
def a(): yield
a().throw(E)

kendallroth

Some projects may have files that should be skipped in Git diff but still show in Git status (and be tracked). This can be made possible with a custom diff driver that uses a no-op command.

Adapted from StackOverflow - @KurzedMetal.

Custom diff driver

Create a global no-op diff command driver with the following command. Note that driver can be limited to local respository by removing the --global flag.

git config diff.nodiff.command /bin/true