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// Here is a function that I use all the time when creating public
// async APIs in JavaScript:
const resolvePromise = (promise, callback) => {
  if (callback)
    promise.then(value => callback(null, value), callback)

  return promise
}

// Sometimes I like to use callbacks, but other times a promise is

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const cameraValid = camera =>
  camera && camera.geometry && Array.isArray(camera.geometry.coordinates);

// Workaround for Mapbox issue
// https://github.com/mapbox/react-native-mapbox-gl/issues/1126
export const enforceIntegerPadding = padding =>
  padding.map(value => parseInt(value, 10));

export const isValidBounds = camera =>
  camera &&

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import React from 'react'
import { renderToString, renderToStaticMarkup } from 'react-dom/server'
import ApolloClient, { createNetworkInterface,  } from 'apollo-client'
import { ApolloProvider, getDataFromTree } from 'react-apollo'

// Apollo Setup
const networkInterface = createNetworkInterface({
  uri: process.env.GRAPHCOOL_API
})

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// ES6 module syntax
import LocalizedStrings from 'react-native-localization';

let AppStrings = new LocalizedStrings({
  'en-US': {
    settingMenuOptionOne: 'Centimeters ({0})',
  },
  en: {
    settingMenuOptionOne: 'Centimeters ({0})',
  },

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// useFetch.ts
import { useEffect, useState } from 'react'

export interface IPosts {
  userId: number;
  id: number;
  title: string;
  body: string;
}

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import React, { useReducer, useContext, ReactNode } from 'react'
import { Text, View, TouchableOpacity, StyleSheet } from 'react-native'

const initialArg = 0

type Action =
  | { type: 'increment' }
  | { type: 'decrement' }
  | { type: 'set'; count: number }

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import { AsyncStorage } from 'react-native'
import react, { useEffect } from "react"
import { useState } from 'react'
import { useNetInfo } from './useNetInfo';

export const getData = async (key: string) => {
  try {
    const value = await AsyncStorage.getItem(key)
    if (value !== null) {
      return JSON.parse(value)

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#

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# Fastfile
#
# Author: Ronaldo Lima <[email protected]>
#
# -----------------------------------------------------------
#
# Version bumping, the default type is `patch`
#   Run:
#     `fastlane ios bump`
#     `fastlane ios beta [type:major|minor|patch]`

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Bridging Native & React for iOS & Android

js -> native

• Simple Example
• Callbacks
• Promises
• Properties

native -> js