Jonatan Rodríguez ionatan-israel

Here is a high level overview for what you need to do to get most of an Android environment setup and maintained.

Prerequisites (for Homebrew at a minimum, lots of other tools need these too):

XCode is installed (via the App Store)
XCode command line tools are installed (xcode-select --install will prompt up a dialog)
Java

Install Homebrew:

ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"

Flutter

A quick cheatsheet of useful snippet for Flutter

Widget

A widget is the basic type of controller in Flutter Material. There are two type of basic Widget we can extend our classes: StatefulWidget or StatelessWidget.

Stateful

StatefulWidget are all the widget that interally have a dynamic value that can change during usage. It can receive an input value in the constructor or reference to functions. You need to create two classes like:

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

	# import required libraries
	import pandas as pd
	import yfinance as yf
	import numpy as np
	import math

	# get stock prices
	df = yf.download('AAPL', start='2020-01-01', threads= False)

	# parameter setup

	const scraper = require('./scrape.js')
	const models = require('./models.js')

	const processModels = models => Promise.all(
	models.map(model => processLinks(model, model.urls))
	).then(
	result => console.log(JSON.stringify(result))
	)

	const processLinks = (model, urls) => Promise.all(

	from random import choice
	from scrapy import signals
	from scrapy.exceptions import NotConfigured


	class RotateUserAgentMiddleware(object):
	"""Rotate user-agent for each request."""
	def __init__(self, user_agents):
	self.enabled = False
	self.user_agents = user_agents

	# Boot to recovery mode and disable system integrity protection
	csrutil disable

	# Reboot to regular mode and purge these motherfuckin plists
	sudo rm -f /System/Library/Extensions/IOPlatformPluginFamily.kext/Contents/PlugIns/ACPI_SMC_PlatformPlugin.kext/Contents/Resources/*.plist

	# Reboot to recovery mode and enable system integrity protection
	csrutil enable

	# Reboot

	# Edito /etc/hosts
	192.168.0.100 frontend.test
	192.168.0.101 backend.test

	# Asigno alias a lo0
	sudo ifconfig lo0 192.168.0.101 alias
	sudo ifconfig lo0 192.168.0.100 alias

	# sudo nano /etc/pf.anchors/development.forwarding
	rdr pass on lo0 inet proto tcp from any to 192.168.0.100 port 80 -> 127.0.0.1 port 3000

	// Async/Await requirements: Latest Chrome/FF browser or Babel: https://babeljs.io/docs/plugins/transform-async-to-generator/
	// Fetch requirements: Latest Chrome/FF browser or Github fetch polyfill: https://github.com/github/fetch

	// async function
	async function fetchAsync () {
	// await response of fetch call
	let response = await fetch('https://api.github.com');
	// only proceed once promise is resolved
	let data = await response.json();
	// only proceed once second promise is resolved

	function loging( $obj ) {
	ob_start();
	var_dump( $obj );
	error_log(ob_get_clean());
	}