From 8c9b24b2e05baac45b76ce1a0723890e4c7d8950 Mon Sep 17 00:00:00 2001
From: Brendan Klein <bklein5@emich.edu>
Date: Sun, 10 Sep 2023 17:13:33 -0400
Subject: [PATCH] chore: Finished Day 4 exercises (Levels 1,2, and 3)

- Finished all exercises for day 4, Levels 1,2, and 3
- Day 4 (Arrays) - Complete
---
 05_Day_Arrays/Exercises/data/countries.js | 195 +++++++++++++
 05_Day_Arrays/Exercises/data/web_techs.js |   8 +
 05_Day_Arrays/Exercises/index.html        |  18 ++
 05_Day_Arrays/Exercises/scripts/main.js   | 331 ++++++++++++++++++++++
 4 files changed, 552 insertions(+)
 create mode 100644 05_Day_Arrays/Exercises/data/countries.js
 create mode 100644 05_Day_Arrays/Exercises/data/web_techs.js
 create mode 100644 05_Day_Arrays/Exercises/index.html
 create mode 100644 05_Day_Arrays/Exercises/scripts/main.js

diff --git a/05_Day_Arrays/Exercises/data/countries.js b/05_Day_Arrays/Exercises/data/countries.js
new file mode 100644
index 0000000..e57b005
--- /dev/null
+++ b/05_Day_Arrays/Exercises/data/countries.js
@@ -0,0 +1,195 @@
+const countries = [
+  'Afghanistan',
+  'Albania',
+  'Algeria',
+  'Andorra',
+  'Angola',
+  'Antigua and Barbuda',
+  'Argentina',
+  'Armenia',
+  'Australia',
+  'Austria',
+  'Azerbaijan',
+  'Bahamas',
+  'Bahrain',
+  'Bangladesh',
+  'Barbados',
+  'Belarus',
+  'Belgium',
+  'Belize',
+  'Benin',
+  'Bhutan',
+  'Bolivia',
+  'Bosnia and Herzegovina',
+  'Botswana',
+  'Brazil',
+  'Brunei',
+  'Bulgaria',
+  'Burkina Faso',
+  'Burundi',
+  'Cambodia',
+  'Cameroon',
+  'Canada',
+  'Cape Verde',
+  'Central African Republic',
+  'Chad',
+  'Chile',
+  'China',
+  'Colombi',
+  'Comoros',
+  'Congo (Brazzaville)',
+  'Congo',
+  'Costa Rica',
+  "Cote d'Ivoire",
+  'Croatia',
+  'Cuba',
+  'Cyprus',
+  'Czech Republic',
+  'Denmark',
+  'Djibouti',
+  'Dominica',
+  'Dominican Republic',
+  'East Timor (Timor Timur)',
+  'Ecuador',
+  'Egypt',
+  'El Salvador',
+  'Equatorial Guinea',
+  'Eritrea',
+  'Estonia',
+  'Ethiopia',
+  'Fiji',
+  'Finland',
+  'France',
+  'Gabon',
+  'Gambia, The',
+  'Georgia',
+  'Germany',
+  'Ghana',
+  'Greece',
+  'Grenada',
+  'Guatemala',
+  'Guinea',
+  'Guinea-Bissau',
+  'Guyana',
+  'Haiti',
+  'Honduras',
+  'Hungary',
+  'Iceland',
+  'India',
+  'Indonesia',
+  'Iran',
+  'Iraq',
+  'Ireland',
+  'Israel',
+  'Italy',
+  'Jamaica',
+  'Japan',
+  'Jordan',
+  'Kazakhstan',
+  'Kenya',
+  'Kiribati',
+  'Korea, North',
+  'Korea, South',
+  'Kuwait',
+  'Kyrgyzstan',
+  'Laos',
+  'Latvia',
+  'Lebanon',
+  'Lesotho',
+  'Liberia',
+  'Libya',
+  'Liechtenstein',
+  'Lithuania',
+  'Luxembourg',
+  'Macedonia',
+  'Madagascar',
+  'Malawi',
+  'Malaysia',
+  'Maldives',
+  'Mali',
+  'Malta',
+  'Marshall Islands',
+  'Mauritania',
+  'Mauritius',
+  'Mexico',
+  'Micronesia',
+  'Moldova',
+  'Monaco',
+  'Mongolia',
+  'Morocco',
+  'Mozambique',
+  'Myanmar',
+  'Namibia',
+  'Nauru',
+  'Nepal',
+  'Netherlands',
+  'New Zealand',
+  'Nicaragua',
+  'Niger',
+  'Nigeria',
+  'Norway',
+  'Oman',
+  'Pakistan',
+  'Palau',
+  'Panama',
+  'Papua New Guinea',
+  'Paraguay',
+  'Peru',
+  'Philippines',
+  'Poland',
+  'Portugal',
+  'Qatar',
+  'Romania',
+  'Russia',
+  'Rwanda',
+  'Saint Kitts and Nevis',
+  'Saint Lucia',
+  'Saint Vincent',
+  'Samoa',
+  'San Marino',
+  'Sao Tome and Principe',
+  'Saudi Arabia',
+  'Senegal',
+  'Serbia and Montenegro',
+  'Seychelles',
+  'Sierra Leone',
+  'Singapore',
+  'Slovakia',
+  'Slovenia',
+  'Solomon Islands',
+  'Somalia',
+  'South Africa',
+  'Spain',
+  'Sri Lanka',
+  'Sudan',
+  'Suriname',
+  'Swaziland',
+  'Sweden',
+  'Switzerland',
+  'Syria',
+  'Taiwan',
+  'Tajikistan',
+  'Tanzania',
+  'Thailand',
+  'Togo',
+  'Tonga',
+  'Trinidad and Tobago',
+  'Tunisia',
+  'Turkey',
+  'Turkmenistan',
+  'Tuvalu',
+  'Uganda',
+  'Ukraine',
+  'United Arab Emirates',
+  'United Kingdom',
+  'United States',
+  'Uruguay',
+  'Uzbekistan',
+  'Vanuatu',
+  'Vatican City',
+  'Venezuela',
+  'Vietnam',
+  'Yemen',
+  'Zambia',
+  'Zimbabwe'
+]
diff --git a/05_Day_Arrays/Exercises/data/web_techs.js b/05_Day_Arrays/Exercises/data/web_techs.js
new file mode 100644
index 0000000..0ccde5f
--- /dev/null
+++ b/05_Day_Arrays/Exercises/data/web_techs.js
@@ -0,0 +1,8 @@
+const webTechs = [
+    'HTML', 
+    'CSS', 
+    'JS', 
+    'React', 
+    'Redux', 
+    'Node', 
+    'MongDB'] // array of web technologies
\ No newline at end of file
diff --git a/05_Day_Arrays/Exercises/index.html b/05_Day_Arrays/Exercises/index.html
new file mode 100644
index 0000000..7d4d2f4
--- /dev/null
+++ b/05_Day_Arrays/Exercises/index.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+	<title>30DaysOfJavaScript:05 Day </title>
+</head>
+
+<body>
+	<h1>30DaysOfJavaScript:05 Day</h1>
+	<h2>Arrays</h2>
+
+	<script src="./data/countries.js"></script>
+	<script src="./data/web_techs.js"></script>
+	<script src="./scripts/main.js"></script>
+
+</body>
+
+</html>
\ No newline at end of file
diff --git a/05_Day_Arrays/Exercises/scripts/main.js b/05_Day_Arrays/Exercises/scripts/main.js
new file mode 100644
index 0000000..c51cfc3
--- /dev/null
+++ b/05_Day_Arrays/Exercises/scripts/main.js
@@ -0,0 +1,331 @@
+console.log(countries)
+
+//Exercises Level 1
+
+    //Exercise 1 -- Declares an empty array
+        var emptyArray = [];
+
+    //Exercise 2 -- Declare an array with more than 5 elements
+        var names = ["Brendan", "Jacob", "Chloe", "Katherine", "Nicole", "Sienna"];
+
+    //Exercise 3 -- Find the length of your array in #2 and prints it to console
+        var lengthOfArray = names.length
+        console.log(`Length of names array is: ${lengthOfArray}`);
+
+    //Exercise 4 -- Gets the first, middle, and last item of the array from exercise 3 and print the result to console
+        var firstElement = names[0];
+        var middleElement;
+
+        console.log(`First element: ${firstElement}`);
+
+        (names.length%2==0)
+            ?console.log(`Middle elements are ${names[Math.floor((names.length-1)/2)]} and ${names[Math.ceil((names.length-1)/2)]}`) //value is true
+            :console.log(`${names[((names.length-1)/2)]}`);   //value is false
+
+        var lastElement = names[names.length-1];
+
+        console.log(`Last element: ${lastElement}`);
+
+    //Exercise 5 -- Declare an array called mixedDataTypes, put different data types in 
+    //the array and find the length of the array. The array size should be greater than 5
+        var mixedDataTypes = [1, 2, 3, "myString", "yourString", true, false];
+
+        console.log(`Length of mixedDataTypes is ${mixedDataTypes.length}`);
+    
+    //Exercise 6 -- Declares an array named itCompanies and assigned initial values Facebook, Google, Microsoft, Apple, IBM, Oracle and Amazon
+        var itCompanies = ["Facebook","Google","Microsoft","Apple","IBM","Oracle","Amazon"];
+    
+    //Exercise 7 -- Prints the array using console.log()
+        console.log(itCompanies);
+
+    //Exercise 8 -- Prints the number of companies in the itCompanies array
+        console.log(`Number of itCompanies is ${itCompanies.length}`);
+
+    //Exercise 9 -- Prints the first company, middle and last company (from itCompanies)
+        var first = itCompanies[0];
+
+        var middle;
+        (itCompanies.length%2==0)
+            ?console.log(`Middle elements are ${itCompanies[Math.floor((itCompanies.length-1)/2)]} and ${itCompanies[Math.ceil((itCompanies.length-1)/2)]}`) //value is true
+            :console.log(`${itCompanies[((itCompanies.length-1)/2)]}`);   //value is false
+
+        var last = itCompanies[itCompanies.length-1];
+    
+    //Exercise 10 -- Prints out each company
+        for(var i=0;i<itCompanies.length;i++)
+            console.log(itCompanies[i]);
+
+    //Exercise 11 -- Changes each company name to uppercase one by one and print them out
+        var uppercaseITCompanies = [];    
+
+        for(var v=0; v<itCompanies.length; v++)
+        {
+            uppercaseITCompanies[v] = itCompanies[v].toUpperCase();
+        }
+        
+        console.log(itCompanies.join(", "));
+
+    //Exercise 12 -- Prints the array like as a sentence: Facebook, Google, Microsoft, Apple, IBM, Oracle and Amazon are big IT companies.
+        console.log(`${itCompanies.join(", ")} are big IT companies`);
+
+    //Exercise 13 -- Checks to if a certain company exists in the itCompanies array. 
+    //If it exists return the company else returns the company is not found
+        function searchStringInArray (str, strArray) 
+        {
+            for (var j=0; j<strArray.length; j++) 
+            {
+                if ((strArray[j]).toLowerCase().match(str.toLowerCase())) 
+                    return j;
+            }
+            return -1;
+        }
+        
+        var userInput = prompt("Enter a company: ");
+        userInput = userInput.toLowerCase();
+        console.log(`Enter a company: ${userInput}`);
+
+        var tempValue = searchStringInArray(userInput, itCompanies);
+
+        if(tempValue>=0)
+            console.log(`${itCompanies[tempValue]}`);
+        else
+            console.log('The company is not found');
+
+    //Exercise 14 -- Filter out companies which have more than one 'o' without the filter method
+        var tempItCompanies = [];
+        var filterCounter = 0;
+
+        for(var a=0; a<itCompanies.length; a++) //Searches through each index in itCompanies array
+        {
+            filterCounter = 0;
+
+            for(var c=0; c< itCompanies[a].length; c++)    //Searches through each letter of each word in itCompanies array
+            {
+                if(itCompanies[a].charAt(c).toLowerCase() == 'o')
+                    filterCounter = filterCounter +1;
+            }
+
+            if(filterCounter<=1)
+                tempItCompanies.push(itCompanies[a]);
+        }
+        itCompanies = tempItCompanies
+        console.log(itCompanies);
+
+    //Exercise 15 -- Sort the array using sort() method and prints the result to console
+        itCompanies.sort();
+        console.log(`Sorted itCompanies array: ${itCompanies}`);
+
+    //Exercise 16 -- Reverse the array using reverse() method and prints the result to console
+        itCompanies.reverse();
+        console.log(`Reversed itCompanies array: ${itCompanies}`);
+
+    //Exercise 17 -- Slice out the first 3 companies from the array and prints the result to console
+        console.log(itCompanies.slice(0,3));
+
+    //Exercise 18 -- Slice out the last 3 companies from the array and prints the result to console
+        console.log(itCompanies.slice(itCompanies.length-3,itCompanies.length));
+        
+    //Exercise 19 -- Slice out the middle IT company or companies from the array and prints the result to console
+        if((itCompanies.length % 2) == 0)
+        {
+            var Variable1 = (Math.floor(itCompanies.length/2))-1;
+            var Variable2 = (Math.ceil(itCompanies.length/2))+1;
+
+            console.log(Variable1);
+            console.log(Variable2);
+
+            var tempVariable1 = itCompanies.slice(0,Variable1);
+            var tempVariable2 = itCompanies.slice(Variable2, itCompanies.length)
+            
+            tempVariable1 = tempVariable1.concat(tempVariable2);
+            console.log(tempVariable1);
+        }
+        else
+        {
+            var Variable1 = (Math.floor(itCompanies.length/2));
+            var Variable2 = (Math.ceil(itCompanies.length/2));
+
+            var tempVariable1 = itCompanies.slice(0,Variable1);
+            var tempVariable2 = itCompanies.slice(Variable2, itCompanies.length)
+            
+            tempVariable1 = tempVariable1.concat(tempVariable2);
+            console.log(tempVariable1)
+        }
+
+    //Exercise 20 -- Removes the first IT company from the array and prints the result to console
+        console.log(`Splicing first element ${itCompanies.splice(0,1)} from itCompanies array`);
+        console.log(itCompanies);
+
+    //Exercise 21 -- Remove the middle IT company or companies from the array and prints the result to console
+        console.log(itCompanies);    
+
+        if (itCompanies.length % 2 == 0)
+        {
+            var string1 = itCompanies.slice(0,(Math.floor(itCompanies.length)/2)-1);
+            console.log((Math.floor(itCompanies.length)/2)-1);
+            var string2 = itCompanies.slice((Math.ceil(itCompanies.length)/2)+1);
+            string2 = string2.toString();
+            string1.push(string2);
+            console.log(string1);
+        }
+        else
+        {
+            var string1 = itCompanies.slice(0, Math.floor((itCompanies.length-1)/2));
+            console.log(string1);
+            var string2 = itCompanies.slice( (Math.floor(itCompanies.length/2)+1),(Math.ceil(itCompanies.length/2)+1));
+            string2 = string2.toString();
+
+            string1.push(string2);
+            console.log(string1);
+
+            itCompanies = string1;
+        }
+
+
+    //Exercise 22 -- Remove the last IT company from the array and prints the result to console
+        console.log(`Before removing last company from itCompanies array ${itCompanies}`);
+        itCompanies.pop();
+        console.log(`After removing last company from itCompanies array ${itCompanies}`);
+
+    //Exercise 23 -- Removes all IT companies from itCompanies array and prints the result to console
+        itCompanies = [];
+        console.log(`${itCompanies}`);
+
+//Exercises Level 2
+
+    //Exercise 1 -- Create a separate countries.js file and store the countries array in to this file
+    //create a separate file web_techs.js and store the webTechs array in to this file. Access both files in main.js file
+        console.log(countries);
+        console.log(webTechs);
+
+    //Exercise 2 -- First remove all the punctuations and change the string to array and count the number of words in the array
+        let text = 'I love teaching and empowering people. I teach HTML, CSS, JS, React, Python.';
+
+        text = text.replace(/[,.!?]/g,"");
+        var newArray = text.split(" ");
+
+        console.log(newArray);
+        console.log(`Length of text array: ${newArray.length}`);
+        
+    //Exercise 3 -- In the following shopping cart add, remove, edit items
+        const shoppingCart = ['Milk', 'Coffee', 'Tea', 'Honey'];
+        
+        //add 'Meat' in the beginning of your shopping cart if it has not been already added
+            var tempString = shoppingCart.toString();
+
+            if(!tempString.includes('Meat'))
+                shoppingCart.unshift('Meat');
+
+            console.log(shoppingCart);
+
+        //add Sugar at the end of you shopping cart if it has not been already added
+            tempString = shoppingCart.toString();
+
+            if(!tempString.includes('Sugar'))
+                shoppingCart.push('Sugar');            
+
+        //remove 'Honey' if you are allergic to honey
+            //I am not allergic to honey, so I did not remove from array
+
+        //modify Tea to 'Green Tea'
+            var teaIndex = shoppingCart.indexOf('Tea');
+            shoppingCart[teaIndex] = 'Green Tea';
+
+        console.log(shoppingCart);
+
+    //Exercise 4 -- In countries array check if 'Ethiopia' exists in the array if it exists print 'ETHIOPIA'. If it does not exist add to the countries list.
+        //Uses searchStringInArray function from Exercises Level 1, Exercise 13
+        var tempIndex = searchStringInArray('Ethiopia', countries);
+
+        if(tempIndex>=0)
+            console.log(`${(countries[tempIndex]).toUpperCase()}`);  //Prints country if found in countries array
+        else
+        {
+            countries.push('Ethiopia');                             //Adds to end of array if not found
+            console.log(countries);
+        }
+
+    //Exercise 5 -- In the webTechs array check if Sass exists in the array and if it exists print 'Sass is a CSS preprocess'. If it does not exist add Sass to the array and print the array.
+        //Uses searchStringInArray function from Exercises Level 1, Exercise 13 and tempIndex from Exercises Level 2, Exercise 4
+        tempIndex = searchStringInArray('Sass', webTechs);
+
+        if(tempIndex>=0)
+            console.log('Sass is a CSS preprocess');
+        else
+        {
+            webTechs.push('Sass');
+            console.log(webTechs);
+        }
+
+    //Exercise 6 -- Concatenate the given two variables and store it in a fullStack variable, and prints fullStack to console
+        const frontEnd = ['HTML', 'CSS', 'JS', 'React', 'Redux'];
+        const backEnd = ['Node','Express', 'MongoDB'];
+        const fullStack = frontEnd.concat(backEnd);
+
+        console.log(fullStack);
+
+//Exercises Level 3
+
+    //Exercise 1 -- The following is an array of 10 students ages:
+        const ages = [19, 22, 19, 24, 20, 25, 26, 24, 25, 24];
+
+        // Sort the array and find the min and max age
+            ages.sort();
+            console.log(`Min age of students: ${ages[0]}   Max age of students: ${ages[ages.length-1]}`);
+
+        // Find the median age(one middle item or two middle items divided by two)
+            var middleValueHolder = ((ages.length-1)/2);
+            var median = 0;
+
+            if(ages.length % 2 == 0)
+                median = ((ages[Math.floor(middleValueHolder)]+ages[Math.ceil(middleValueHolder)])/2);
+            else
+                median = ages[Math.floor((ages.length-1)/2)];  //Tested and fully working
+
+            console.log(median);
+
+        // Find the average age(all items divided by number of items)
+            var numAgeElements = ages.length;
+            var averageAge = 0;
+
+            for(var b=0; b<ages.length; b++)
+                averageAge = averageAge + ages[b];
+
+            averageAge = (averageAge/ages.length);
+            console.log(`Average age is: ${averageAge}`);
+
+        // Find the range of the ages(max minus min)
+            var range = (ages[ages.length-1]-ages[0]);
+            console.log(`Range of ages: ${range}`);
+        
+        // Compare the value of (min - average) and (max - average), use abs() method 
+            var temp1 = Math.abs(ages[0] - averageAge);
+            console.log(`abs(min - average): ${temp1}`);
+            
+            temp1 = (ages[ages.length-1] - averageAge)
+            console.log(`(max - average): ${temp1}`);
+
+    //Exercise 2 -- Two parts
+        //Slice the first ten countries from the countries array and prints the result to console
+            console.log(countries.slice(0,10));
+
+        //Find the middle country(ies) in the countries array
+            //Uses middleValueHolder variable from Exercises Level 3, Problem 1
+            middleValueHolder = ((countries.length-1)/2);
+
+            if(countries.length % 2 == 0)
+                console.log(`'${countries[Math.floor(middleValueHolder)]}' and '${countries[Math.ceil(middleValueHolder)]}' are middle countries`);
+            else
+                console.log(`'${countries[Math.floor((countries.length-1)/2)]}' is the middle element in the array`);  //Tested and fully working
+
+    //Exercise 3 -- Divide the countries array into two equal arrays if it is even. If countries array is not even , one more country for the first half.  Prints the result to the console
+        //Uses middleValueHolder variable from Exercises Level 3, Problem 1
+        middleValueHolder = ((countries.length-1)/2);
+
+        console.log(countries.length);
+        var firstCountriesArray = countries.slice(0, Math.floor(middleValueHolder)+1);
+        var secondCountriesArray = countries.slice(Math.ceil(middleValueHolder)+1, countries.length);
+
+        console.log(`FirstArray Length: ${firstCountriesArray.length}    SecondArray Length: ${secondCountriesArray.length}`);
+        console.log(firstCountriesArray);
+        console.log(secondCountriesArray);
\ No newline at end of file