r0b0t3d

1. Use

1.1. in callback

const handlePress = useCallback(() => {
	// handle press
}, [])

Good 👍

<Button onPress={handlePress} />

heron2014

useEffect(fn) // run function on every render
useEffect(fn, []) // run function only when the component is first rendered
useEffect(fn, [value]) //run function when component is first rendered and when the `value` changes

// Remember if you pass dependency(value) which is an object - React perform
// strict comparision using "===" of the first level properties and will not
// conduct comparisons deeper into the properties.

fokusferit

Shallow

Real unit test (isolation, no children render)

Simple shallow

Calls:

• constructor
• render

heron2014

Visual instructions how to enable Google Maps on IOS using react-native-maps

UPDATE: Following instructions are now a year old. I have recently managed to upgrade react-native-maps from 0.17 to the latest version 0.21 with react-native 0.51 - if you want to follow my instruction scroll down to the end this doc! Hope that will work for you too!

This is for my personal use, things might not be correctly explained here. For the official docs please check https://github.com/airbnb/react-native-maps

Steps from scratch:

1.react-native init GoogleMapPlayground

MustafaHaddara

/*
Copyright (c) 2015 Kristopher Johnson

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions: