Mohammad H. Sattarian mhsattarian

React recently introduced an experimental profiler API. This page gives instructions on how to use this API in a production release of your app.

Table of Contents

Profiling in production
- Create React App
- Webpack 4

Profiling in production

React DOM automatically supports profiling in development mode for v16.5+, but since profiling adds some small additional overhead it is opt-in for production mode. This gist explains how to opt-in.

Installing Python 3.7.4 on Raspbian

As of July 2018, Raspbian does not yet include the latest Python release, Python 3.7.4. This means we will have to build it ourselves, and here is how to do it.

Install the required build-tools (some might already be installed on your system).

const Moment = require('moment')
const array = [{date:"2018-05-11"},{date:"2018-05-12"},{date:"2018-05-10"}]
const sortedArray  = array.sort((a,b) => new Moment(a.date).format('YYYYMMDD') - new Moment(b.date).format('YYYYMMDD'))
console.log(sortedArray)

	import redis
	import cv2
	import numpy as np
	import time
	import io
	from PIL import Image

	r = redis.StrictRedis.from_url('redis://:password@127.0.0.1:6379/1')
	img_path ="image"

	sudo apt-get install software-properties-common
	sudo add-apt-repository ppa:ondrej/php
	sudo apt-get update
	sudo apt-get install php5.6
	php --version
	sudo apt-get install php5.6-curl php5.6-xml
	sudo apt-get install composer

	/**
	* Compare color difference in RGB
	* @param {Array} rgb1 First RGB color in array
	* @param {Array} rgb2 Second RGB color in array
	*/
	export function deltaRgb (rgb1, rgb2) {
	const [ r1, g1, b1 ] = rgb1,
	[ r2, g2, b2 ] = rgb2,
	drp2 = Math.pow(r1 - r2, 2),
	dgp2 = Math.pow(g1 - g2, 2),

	# Tested on Python 3.6.1

	# install: pip install --upgrade arabic-reshaper
	import arabic_reshaper

	# install: pip install python-bidi
	from bidi.algorithm import get_display

	# install: pip install Pillow
	from PIL import ImageFont

	sudo apt-get install python-software-properties
	sudo add-apt-repository ppa:ondrej/php
	sudo apt-get update
	sudo apt-get install -y php5.6

	#Composer
	sudo apt-get install curl php5-cli git
	curl -sS https://getcomposer.org/installer \| sudo php -- --install-dir=/usr/local/bin --filename=composer

	// custom mapbopx-gl-draw mode that modifies draw_line_string
	// shows a center point, radius line, and circle polygon while drawing
	// forces draw.create on creation of second vertex

	import MapboxDraw from 'mapbox-gl-draw';
	import numeral from 'numeral';
	import lineDistance from 'npm:@turf/line-distance';

	const RadiusMode = MapboxDraw.modes.draw_line_string;