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import React, { useState, useEffect } from 'react'
import { View, Text } from 'react-native'

const Timer = () => {
  const [date, setDate] = useState(60)

  const tick = () => setDate(date - 1)

  useEffect(() => {
    const timerID = setInterval(() => tick(), 1000)

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export const Device = {
  select(variants) {
    if (W >= 300 && W <= 314) return variants.mobile300 || {}
    if (W >= 315 && W <= 341) return variants.iphone5 || {}
    if (W >= 342 && W <= 359) return variants.mobile342 || {}
    if (W >= 360 && W <= 374) return variants.mi5 || {}
    if (W >= 375 && W <= 399) return variants.iphone678 || {}
    if (W >= 400 && W <= 409) return variants.mobile400 || {}
    if (W >= 410 && W <= 414) return variants.googlePixel || {}
    if (W >= 415 && W <= 434) return variants.mobile415 || {}

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const App = () => {
  const { container } = styles
  const [currentIndex, setCurrentIndex] = useState(0)

  const array = [{ title: "Today" }, { title: "Week" }, { title: "Month" }]
  return (
    <View style={container}>
      <Text>{${currentIndex}}</Text>
      {array.map(({ title }, i) => (
        <TouchableOpacity key={title} onPress={() => setCurrentIndex(i)}>

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this.setState(prevState => ({ check: !prevState.check}))

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import React, { Component } from 'react'
import { View, StyleSheet } from 'react-native'
import ButtonTransactionItem from './ButtonTransactionItem'

const styles = StyleSheet.create({
  container: {
    flexDirection: 'row',
    backgroundColor: 'white',
    height: 50
  }

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import { useApolloClient } from 'react-apollo-hooks'

const App = () => {
  const client = useApolloClient()
  const onPress = elem => () => client.writeData({ data: { elem } })

  return (
    <View>
      <TouchableOpacity onPress={onPress('text')}>   
        <Text>Set</Text>

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Продолжаем курс по Redux или клонируем репу: git clone https://github.com/react-native-village/react-native-init.git

Окончательный код проекта дуступен здесь

Переходим в папку проекта cd react-native-init/stargate2

Удалям редакс из проекта

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export default {
  test: 'Hello',
  history: [
    {
      id: 0,
      up: false,
    },
    {
      id: 1,
      up: false,

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import React from 'react'
import { Provider } from 'react-redux'
import { composeWithDevTools } from 'redux-devtools-extension'
import { createStore, applyMiddleware } from 'redux'
import ReduxThunk from 'redux-thunk'
import reducers from './src/reducers'
import AppNavigator from './src/AppNavigator'

const store = createStore(reducers, composeWithDevTools(applyMiddleware(ReduxThunk)))

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import React from 'react'
import {
  createStackNavigator,
  createAppContainer,
  createBottomTabNavigator
} from 'react-navigation'
import { Reg, Settings, Wallet, Send, Recieve, History, Scan } from './screens'
import { ButtonTab } from './components'
import SettingsPassword from './screens/Settings/SettingsPassword'
import SendMain from './screens/Send/SendMain'