Completed most object exercises

01_Day_JavaScript_Refresher/01_javascript_refresher/Array Exercises/countries.js

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+const countries = [
+	'Albania',
+	'Bolivia',
+	'Canada',
+	'Denmark',
+	'Ethiopia',
+	'Finland',
+	'Germany',
+	'Hungary',
+	'Ireland',
+	'Japan',
+	'Kenya',
+];
+
+module.exports = {countries};

01_Day_JavaScript_Refresher/01_javascript_refresher/Array Exercises/level1.js

@@ -1,27 +1,3 @@
-const countries = [
-    'Albania',
-    'Bolivia',
-    'Canada',
-    'Denmark',
-    'Ethiopia',
-    'Finland',
-    'Germany',
-    'Hungary',
-    'Ireland',
-    'Japan',
-    'Kenya',
-  ];
-  
-  const webTechs = [
-    'HTML',
-    'CSS',
-    'JavaScript',
-    'React',
-    'Redux',
-    'Node',
-    'MongoDB',
-  ];
-
 // 1
 const array = [];
 

01_Day_JavaScript_Refresher/01_javascript_refresher/Array Exercises/level3.js

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+const countries = require('./countries.js').countries;
+const webTechs = require('./web_techs.js').webTechs;
+
+Array.prototype.max = function() {
+    this.sort();
+    return this[this.length - 1];
+}
+
+Array.prototype.min = function() {
+    this.sort();
+    return this[0];
+}
+
+Array.prototype.median = function() {
+    this.sort();
+    const middle = Math.floor(this.length/2);
+
+    if (this.length % 2 == 1) {
+        return this[middle];
+    }
+
+    return (this[middle] + this[middle + 1]) / 2;
+}
+
+Array.prototype.sum = function() {
+    let result = 0;
+    
+    this.forEach(val => {
+        result += val;
+    });
+    
+    return result;
+}
+
+Array.prototype.average = function() {
+    return this.sum()/this.length;
+}
+
+Array.prototype.range = function() {
+    return this.max() - this.min();
+}
+
+const ages = [19, 22, 19, 24, 20, 25, 26, 24, 25, 24];
+ages.sort();
+console.log("max:", ages.max(), "min:", ages.min());
+console.log("median", ages.median());
+console.log("average", ages.average());
+console.log("range", ages.range());
+console.log("lower", Math.abs(ages.min() - ages.average()), "higher", Math.abs(ages.max() - ages.average()));
+
+const firstTen = countries.slice(0, 10);
+console.log(firstTen);
+console.log(countries.median());
+
+let firstHalf;
+let secondHalf;
+
+if (countries.length % 2 == 0) {
+    firstHalf = countries.slice(0, countries.length / 2);
+    secondHalf = countries.slice(countries.length/2, countries.length);
+} else {
+    countries.unshift("Country");
+}
+
+console.log(firstHalf, secondHalf);

01_Day_JavaScript_Refresher/01_javascript_refresher/Array Exercises/main.js

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+let text = 'I love teaching and empowering people. I teach HTML, CSS, JS, React, Python.';
+// console.log(words);
+// console.log(words.length);
+
+let words = text;
+
+for (let code = 33; code <= 47; code++) {
+    words = words.replaceAll(String.fromCharCode(code), '');
+}
+words = words.split(' ');
+console.log(words);
+console.log(words.length);
+
+const shoppingCart = ['Milk', 'Coffee', 'Tea', 'Honey']
+shoppingCart.unshift('Meat');
+shoppingCart.push('Sugar');
+shoppingCart.splice(shoppingCart.indexOf('Honey'), 1);
+shoppingCart[shoppingCart.indexOf('Tea')] = 'Green Tea';
+console.log(shoppingCart);
+
+const countries = require("./countries.js");
+
+if (countries.countries.indexOf('Ethiopia') != -1) {
+    console.log('ETHIOPIA');
+} else {
+    countries.countries.push('Ethiopia');
+}
+
+const webTechs = require("./web_techs.js");
+
+if (webTechs.webTechs.indexOf('Sass') != -1) {
+    console.log('Sass is a CSS preprocess');
+} else {
+    webTechs.webTechs.push('Sass');
+    console.log(webTechs.webTechs);
+}
+
+const frontEnd = ['HTML', 'CSS', 'JS', 'React', 'Redux']
+const backEnd = ['Node', 'Express', 'MongoDB']
+
+const fullStack = frontEnd.concat(backEnd);
+console.log(fullStack);

01_Day_JavaScript_Refresher/01_javascript_refresher/Array Exercises/web_techs.js

@@ -0,0 +1,11 @@
+const webTechs = [
+    'HTML',
+    'CSS',
+    'JavaScript',
+    'React',
+    'Redux',
+    'Node',
+    'MongoDB',
+];
+
+module.exports = {webTechs};

01_Day_JavaScript_Refresher/01_javascript_refresher/Conditional Exercises/level1.html

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+<script src="./level1.js"></script>

01_Day_JavaScript_Refresher/01_javascript_refresher/Conditional Exercises/level1.js

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+// let userAge = prompt("Enter your age: ");
+// if (userAge >= 18)
+//     confirm("You are old enough to drive.");
+// else
+//     confirm("You are left with " + (18 - userAge) + " to drive.");
+
+// const myAge = 19;
+
+// if (userAge < myAge)
+//     confirm("You are " + (myAge - userAge) + " younger than me!");
+// else if (userAge > myAge)
+//     confirm("You are " + (userAge - myAge) + " older than me!");
+// else
+//     confirm("You are the same age as me!");
+
+function aGreaterThanB(a, b) {
+    // if (a > b) {
+    //     console.log("a is greater than b");
+    // } else {
+    //     console.log("a is less than b");
+    // }
+
+    a > b ?
+        console.log("a is greater than b") :
+        console.log("a is less than b");
+}
+
+function isEven(value) {
+    if (value % 2 == 0) {
+        console.log("The value is even");
+        return true;
+    } else {
+        console.log("The value is odd");
+        return false;
+    }
+}

01_Day_JavaScript_Refresher/01_javascript_refresher/Conditional Exercises/level2.js

@@ -0,0 +1,36 @@
+function gradeGiver(grade) {
+    if (grade >= 80) {
+        return "A";
+    } else if (grade >= 70) {
+        return "B";
+    } else if (grade >= 60) {
+        return "C";
+    } else if (grade >= 50) {
+        return "D";
+    } else {
+        return "F";
+    }
+}
+
+function whatSeason(month) {
+    const seasons = {
+        "winter": ["december", "january", "february"],
+        "spring": ["march", "april", "may"],
+        "summer": ["june", "july", "august"],
+        "autumn": ["september", "october", "novemeber"]
+    };
+    
+    seasons.keys().forEach(key => {
+        if (seasons[key].find(month.toLowerCase()) != -1) {
+            return key;
+        }
+    });
+}
+
+function isWeekend(day) {
+    if (day.toLowerCase() == "sunday" || day.toLowerCase() == "saturday") {
+        console.log(day, "is a weekend.");
+    } else {
+        console.log(day, "is a working day");
+    }
+}

01_Day_JavaScript_Refresher/01_javascript_refresher/Conditional Exercises/level3.js

@@ -0,0 +1,21 @@
+function daysInMonth(month) {
+    let months = {
+        january:31,
+        february: 28,
+        march: 31,
+        april: 30,
+        may: 31,
+        june: 30,
+        july: 31,
+        august: 31,
+        september: 30,
+        october: 31,
+        novemeber: 30,
+        december: 31
+    };
+    month = month.toLowerCase();
+    if (month == february && isLeapYear()) {
+        return months[month] + 1;
+    }
+    return months[month];
+}

01_Day_JavaScript_Refresher/01_javascript_refresher/Object Exercises/level1.js

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+const dog = {};
+console.log(dog);
+dog.name = "name";
+dog.legs = 4;
+dog.age = 3;
+dog.bark = function() {
+    return "woof woof";
+}
+for (const key in dog) {
+    if (typeof dog[key] == 'function') {
+        console.log(key, dog[key]());
+    } else {
+        console.log(key, dog[key]);
+    }
+}
+dog.breed = "labrador";
+dog.getDogInfo = function() {
+    return `This is ${this.name} and he is ${this.age} years old`;
+}

01_Day_JavaScript_Refresher/01_javascript_refresher/Object Exercises/level2.js

@@ -0,0 +1,63 @@
+const users = {
+    Alex: {
+      email: 'alex@alex.com',
+      skills: ['HTML', 'CSS', 'JavaScript'],
+      age: 20,
+      isLoggedIn: false,
+      points: 30
+    },
+    Asab: {
+      email: 'asab@asab.com',
+      skills: ['HTML', 'CSS', 'JavaScript', 'Redux', 'MongoDB', 'Express', 'React', 'Node'],
+      age: 25,
+      isLoggedIn: false,
+      points: 50
+    },
+    Brook: {
+      email: 'daniel@daniel.com',
+      skills: ['HTML', 'CSS', 'JavaScript', 'React', 'Redux'],
+      age: 30,
+      isLoggedIn: true,
+      points: 50
+    },
+    Daniel: {
+      email: 'daniel@alex.com',
+      skills: ['HTML', 'CSS', 'JavaScript', 'Python'],
+      age: 20,
+      isLoggedIn: false,
+      points: 40
+    },
+    John: {
+      email: 'john@john.com',
+      skills: ['HTML', 'CSS', 'JavaScript', 'React', 'Redux', 'Node.js'],
+      age: 20,
+      isLoggedIn: true,
+      points: 50
+    },
+    Thomas: {
+      email: 'thomas@thomas.com',
+      skills: ['HTML', 'CSS', 'JavaScript', 'React'],
+      age: 20,
+      isLoggedIn: false,
+      points: 40
+    },
+    Paul: {
+      email: 'paul@paul.com',
+      skills: ['HTML', 'CSS', 'JavaScript', 'MongoDB', 'Express', 'React', 'Node'],
+      age: 20,
+      isLoggedIn: false,
+      points: 40
+    }
+}
+
+function mostSkills() {
+    let obj = undefined;
+    for (const person in users) {
+        if (users.person.skills.length > obj.skills.length) {
+            obj = users.person;
+        }
+    }
+    console.log(obj);
+}
+
+mostSkills();