there are other sections e.g. sign in and sign out with firebase, code for the tech stack, code for firebase auth, redux, etc. i have errors while following the course but cannot find the files to download from this repository to compare why i have errors. thanks!

I might be completely wrong or this error would be caused something from my end but I feel for some reason TrackContext file is not able to send functions through Context and Provider ?

I have attached TrackContext as well as createDataContext file.

TrackContext.js
`import createDataContext from "./createDataContext";
import trackerApi from "../api/trackerApi";

const trackReducer = (state, action) => {
switch (action.type) {
case "fetch_tracks":
return action.payload;
default:
return state;
}
};

const fetchTracks = (dispatch) => async () => {
const response = await trackerApi.get("/tracks");
dispatch({ type: "fetch_tracks", payload: response.data });
};
const createTrack = (dispatch) => async (name, locations) => {
console.log(name, locations);
await trackerApi.post("/tracks", { name, locations });
};

export const { Context, Provider } = createDataContext(
trackReducer,
{ fetchTracks, createTrack },
[]
);
`

createDataCOntext.js

`import React, { useReducer } from "react";

export default function createDataContext(reducer, actions, defaultValue) {
const context = React.createContext();

const Provider = ({ children }) => {
const [state, dispatch] = useReducer(reducer, defaultValue);
const boundActions = {};
for (let key in actions) {
boundActions[key] = actionskey;
}

return (
  <context.Provider value={{ state, ...boundActions }}>
    {children}
  </context.Provider>
);

};

return { Context: context, Provider: Provider };
}
`

This is my app.js code:

import { createAppContainer } from 'react-navigation';
import { createStackNavigator } from 'react-navigation-stack';
import HomeScreen from './src/screens/HomeScreen';
import ComponentsScreen from './src/screens/ComponentsScreen';

const navigator = createStackNavigator(
{
Home: HomeScreen,
Component: ComponentsScreen
},
{
initialRouteName: 'Components',
defaultNavigationOptions: {
title: "App"
}
}
);

export default createAppContainer(navigator);

This is my ComponentsScreen.js file:

import React from 'react';
import { Text, StyleSheet } from 'react-native';

const ComponentsScreen = () => {
return This is the Components Screen;
};

const styles = StyleSheet.create ({
textStyle: {
fontSize: 30
}
});

export default ComponentsScreen;

import React from 'react';
import { Text, StyleSheet } from 'react-native';

const ComponentsScreen = () => {
return This is the Components Screen;
};

const styles = StyleSheet.create ({
textStyle: {
fontSize: 30
}
});

export default ComponentsScreen;

In useLocation.js, requesting user permissions is incomplete. As per the docs here, this function always resolves with a PermissionResponse object, even if permission is not granted.

Our code needs to check the response object, and throw an error manually in order to enter the catch block as expected.

I left a comment on the course, but this might be more prudent.

A simple expo upgrade got me back on track, however, I'm just getting started. Not sure if any code will be broken later on.

When I do npm install in rn-starter folder so it shows me many errors

npm ERR! path E:\React Native\First Practice\node_modules.staging\react-native-3ae3ca51\RNTester\RNTesterIntegrationTests\ReferenceImages\RNTester-js-RNTesterApp.ios\testScrollViewExample_1-iOS10_tvOS.png
npm ERR! code EPERM
npm ERR! errno -4048
npm ERR! syscall unlink
npm ERR! Error: EPERM: operation not permitted, unlink 'E:\React Native\First Practice\node_modules.staging\react-native-3ae3ca51\RNTester\RNTesterIntegrationTests\ReferenceImages\RNTester-js-RNTesterApp.ios\testScrollViewExample_1-iOS10_tvOS.png'
npm ERR! [OperationalError: EPERM: operation not permitted, unlink 'E:\React Native\First Practice\node_modules.staging\react-native-3ae3ca51\RNTester\RNTesterIntegrationTests\ReferenceImages\RNTester-js-RNTesterApp.ios\testScrollViewExample_1-iOS10_tvOS.png'] {
npm ERR! cause: [Error: EPERM: operation not permitted, unlink 'E:\React Native\First Practice\node_modules.staging\react-native-3ae3ca51\RNTester\RNTesterIntegrationTests\ReferenceImages\RNTester-js-RNTesterApp.ios\testScrollViewExample_1-iOS10_tvOS.png'] {
npm ERR! errno: -4048,
npm ERR! code: 'EPERM',
npm ERR! syscall: 'unlink',
npm ERR! path: 'E:\React Native\First Practice\node_modules\.staging\react-native-3ae3ca51\RNTester\RNTesterIntegrationTests\ReferenceImages\RNTester-js-RNTesterApp.ios\testScrollViewExample_1-iOS10_tvOS.png'
npm ERR! },
npm ERR! stack: "Error: EPERM: operation not permitted, unlink 'E:\React Native\First Practice\node_modules\.staging\react-native-3ae3ca51\RNTester\RNTesterIntegrationTests\ReferenceImages\RNTester-js-RNTesterApp.ios\testScrollViewExample_1-iOS10_tvOS.png'",
npm ERR! errno: -4048,
npm ERR! code: 'EPERM',
npm ERR! syscall: 'unlink',
npm ERR! path: 'E:\React Native\First Practice\node_modules\.staging\react-native-3ae3ca51\RNTester\RNTesterIntegrationTests\ReferenceImages\RNTester-js-RNTesterApp.ios\testScrollViewExample_1-iOS10_tvOS.png'
npm ERR! }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It's possible that the file was already in use (by a text editor or antivirus),
npm ERR! or that you lack permissions to access it.
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator (though this is not recommended).

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\Dell\AppData\Roaming\npm-cache_logs\2019-08-31T17_33_47_718Z-debug.log

the one he gave in udemy is not updated
here is the eror
to the actual version of core-js@3.
npm ERR! code ETARGET
npm ERR! notarget No matching version found for react@~r.9.0.
npm ERR! notarget In most cases you or one of your dependencies are requesting
npm ERR! notarget a package version that doesn't exist.

npm ERR! A complete log of this run can be found in:
PS F:\web downloads\original\rn-starter> npm install react@~r.9.0.
npm ERR! code ETARGET
npm ERR! notarget No matching version found for react@~r.9.0..
npm ERR! notarget In most cases you or one of your dependencies are requesting
npm ERR! notarget a package version that doesn't exist.

I got issue as below when comment out the _mockLocations.js, and fake with gps on android or running on real iPhone device!

My github repo for this project: https://github.com/GinnyMorning/track010

Can you check why I got this issue,
Thank you.