topherPedersen

// Duplicates: Bob, Aaron, Frank
const arrayWithDuplicates = ["Aaron", "Bob", "Chris", "Dave", "Edward", "Bob", "Aaron", "Frank", "George", "Frank", "Henry", "Bob", "Bob", "Aaron", "Aaron", "Frank"];

function findDuplicates(arrayWithDuplicates) {
	let duplicates = [];
	arrayWithDuplicates.forEach( (value, index) => {
		const indexWhereValueFirstAppears = arrayWithDuplicates.findIndex( (value_) => {
			return value_ === value;
		});
		const indexWhereValueLastAppears = arrayWithDuplicates.lastIndexOf(value);

topherPedersen

// DEMO: Using Union-Types in TypeScript

// Question: What are Union Types???

// Answer: Union Types are TypeScript types which can be equal to many different types which often share 'union' properties amongst the various different types. For example, an Athlete Union-Type could be used to represent FootballPlayer, BasketballPlayer, and BaseballPlayer types

type FootballPlayer = {
    firstName: string,
    lastName: string,
    jerseyNumber: number,

topherPedersen

import React from 'react';
import {
  SafeAreaView,
  StyleSheet,
  ScrollView,
  View,
  Text,
  StatusBar,
} from 'react-native';

topherPedersen

$ cd Desktop

$ mkdir HelloDjango

$ cd HelloDjango

// Create Virtual Environment with Python's venv

$ python -m venv env

topherPedersen

    signingConfigs {

        debug {
            storeFile file('debug.keystore')
            storePassword 'android'
            keyAlias 'androiddebugkey'
            keyPassword 'android'
        }

        release {

topherPedersen

    signingConfigs {
        release {
            if (project.hasProperty('MYAPP_UPLOAD_STORE_FILE')) {
                storeFile file(MYAPP_UPLOAD_STORE_FILE)
                storePassword MYAPP_UPLOAD_STORE_PASSWORD
                keyAlias MYAPP_UPLOAD_KEY_ALIAS
                keyPassword MYAPP_UPLOAD_KEY_PASSWORD
            }
        }
    }

topherPedersen

import React from 'react';
import {
  SafeAreaView,
  StyleSheet,
  ScrollView,
  View,
  Text,
  StatusBar,
} from 'react-native';

topherPedersen

import React from 'react';
import {
  SafeAreaView,
  StyleSheet,
  ScrollView,
  View,
  Text,
  StatusBar,
  Button,
  Linking,

topherPedersen

let oldArray = ["foo", "bar", "baz"];

let newArray = oldArray.map( (item) => {
  if (item === "baz") {
    return "B@Z!";
  } else {
    return item;
  }
});

topherPedersen

<Modal 
  visible={true}
  onShow={ () => { this.textInput.focus(); }}>
  
  {/* Adapted From: https://stackoverflow.com/questions/42730400/focus-input-on-load-of-modal-in-react-native */}

  <KeyboardAvoidingView style={{}}>

    <TextInput 
      style={{}}