jppommet

It seems that it does not matter what timezone is on the server as long as you have the time set right for the current timezone, know the timezone of the datetime columns that you store, and are aware of the issues with daylight savings time.

On the other hand if you have control of the timezones of the servers you work with then you can have everything set to UTC internally and never worry about timezones and DST.

Here are some notes I collected of how to work with timezones as a form of cheatsheet for myself and others which might influence what timezone the person will choose for his/her server and how he/she will store date and time.

MySQL Timezone Cheatsheet

jppommet

1. Check if your network adapter is recognized : lspci -vvnn | grep 14e4
2. Then go read the link https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx#STA_-_Internet_access
3. In case you want to use the windows driver : https://help.ubuntu.com/community/WifiDocs/Driver/Ndiswrapper

jppommet

function int2ip (ipInt) {
    return ( (ipInt>>>24) +'.' + (ipInt>>16 & 255) +'.' + (ipInt>>8 & 255) +'.' + (ipInt & 255) );
}

jppommet

• column: create columns from text input
• tr: translate/substitute/delete input
• join: like a database join but for text
• comm: file comparison like a db join
• paste: put lines in a file next to each other
• rs: reshape arrays
• jot: generate data
• expand: replace spaces and/or tabs
• time: track time and resourcing
• watch: execute something on a schedule in realtime

jppommet

from __future__ import unicode_literals
from youtube_dl import YoutubeDL
import boto3
import os

class Logger(object):
	def debug(self, msg):
		pass

jppommet

// We use crypto.randomBytes(20) as an example to generate the seed with a higher entropy, higher number of unique values 
var hash = crypto.createHash('sha1').update(crypto.randomBytes(20)).digest('hex')

jppommet

How to delete Sidekiq jobs in a Rails app using ActiveJobs

Sidekiq jobs can be enqueued or scheduled. Enqueued means that they are gonna be picked up as soon as possible, scheduled jobs will be enqueued at some specific time.

job_id and jid

When using ActiveJobs, Rails will return a job_id after sending the job to ActiveJobs

job = UserMailer.send_invite(params).deliver_later

jppommet

This list is based on aliases_spec.rb.

You can see also Module: RSpec::Matchers API.

matcher	aliased to	description
a_truthy_value	be_truthy	a truthy value
a_falsey_value	be_falsey	a falsey value
be_falsy	be_falsey	be falsy
a_falsy_value	be_falsey	a falsy value

jppommet

Pry Cheat Sheet

• Youtube Tutorial 2013

Command Line

• pry -r ./config/app_init_file.rb - load your app into a pry session (look at the file loaded by config.ru)
• pry -r ./config/environment.rb - load your rails into a pry session

Debugger

jppommet

#!/bin/sh
#TODO: add exclude <file>.rb in rubocop.yml ?
git status --porcelain | egrep  "^(A|AM|^M).+\.rb$" | awk '{print $NF}' | xargs rubocop -a