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nikolavn · Jun 5, 2015 · 8e80422 · 8e80422
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diff --git a/JS Fundamentals/08.Array Methods/blank.html b/JS Fundamentals/08.Array Methods/blank.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<meta charset="UTF-8">
+	<title>Results</title>
+	<script type="text/javascript" src="problem-1.all-in-one.js"></script>
+</head>
+<body>
+	<h3 style="font-family:Candara">Results in console</h3>
+</body>
+</html>
diff --git a/JS Fundamentals/08.Array Methods/problem-1.all-in-one.js b/JS Fundamentals/08.Array Methods/problem-1.all-in-one.js
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+/*
+Problem 1. Make person
+
+Write a functio for creating persons.
+Each person must have firstname, lastname, age and gender (true is female, false is male)
+Generate an array with ten person with different names, ages and genders
+*/
+
+console.log('------====== Problem 1 ======------');
+
+function Person(firstname,lastname,age,isFemale){
+	this.firstname = firstname;
+	this.lastname = lastname;
+	this.age = age;
+	this.isFemale = isFemale;
+}
+
+var people = [];
+
+people.push(new Person('Georgi','Georgiev',21,false));
+people.push(new Person('Petar','Petrov',16,false));
+people.push(new Person('Mariya','Georgieva',25,true));
+people.push(new Person('Vasil','Vasilev',41,false));
+people.push(new Person('Angel','Angelov',28,false));
+people.push(new Person('Mihaela','Mihailova',11,true));
+people.push(new Person('Todor','Todorov',13,false));
+people.push(new Person('Penka','Penkova',24,true));
+people.push(new Person('Filip','Filipov',36,false));
+people.push(new Person('Dimitar','Dimitrov',35,false));
+
+console.log(people);
+
+/*
+Problem 2. People of age
+
+Write a function that checks if an array of person contains only people of age (with age 18 or greater)
+Use only array methods and no regular loops (for, while)
+*/
+
+console.log('------====== Problem 2 ======------');
+
+var olderThan18 = people.every(function(person){
+	return person.age>18;
+});
+
+var olderThan10 = people.every(function(person){
+	return person.age>10;
+});
+
+console.log('All are older than 18?: '+olderThan18);
+console.log('All are older than 10?: '+olderThan10);
+
+/*
+Problem 3. Underage people
+
+Write a function that prints all underaged persons of an array of person
+Use Array#filter and Array#forEach
+Use only array methods and no regular loops (for, while)
+*/
+
+console.log('------====== Problem 3 ======------');
+
+console.log('All underage: ');
+var underage = people.filter(function(person){
+	return person.age < 18;
+}).forEach(function(person){
+	console.log(person);
+});
+
+/*
+Problem 4. Average age of females
+
+Write a function that calculates the average age of all females, extracted from an array of persons
+Use Array#filter
+Use only array methods and no regular loops (for, while)
+*/
+
+console.log('------====== Problem 4 ======------');
+
+var females = people.filter(function(person){
+	return person.isFemale;
+});
+
+var ageOfFemales = females.reduce(function(ageSum,female){
+
+	return ageSum+female.age;
+},0);
+
+console.log('Average age of females: '+ageOfFemales/females.length);
+
+/*
+Problem 5. Youngest person
+
+Write a function that finds the youngest male person in a given array of people and prints his full name
+Use only array methods and no regular loops (for, while)
+Use Array#find
+*/
+
+console.log('------====== Problem 5 ======------');
+
+if (!Array.prototype.find) {
+	Array.prototype.find = function(callback) {
+		var i,
+			len;
+
+		for (i = 0, len = this.length; i < len; i += 1) {
+			if (callback(this[i], i, this)) {
+				return this[i];
+			}
+		}
+
+		return undefined;
+	};
+}
+
+var youngest = people.sort(function(person1, person2) {
+		return person1.age > person2.age;
+	})
+	.find(function(person) {
+		return !person.isFemale;
+	});
+
+console.log('Youngest: '+youngest.firstname+' '+youngest.lastname);
+
+/*
+Problem 6. Group people
+
+Write a function that groups an array of persons by first letter of first name and returns the groups as a JavaScript Object
+Use Array#reduce
+Use only array methods and no regular loops (for, while)
+*/
+
+console.log('------====== Problem 6 ======------');
+
+var groupedPeople = people.reduce(function(grouped,person){
+	if (grouped[person.firstname[0]]) {
+		grouped[person.firstname[0]].push(person);
+	}
+	else{
+		grouped[person.firstname[0]] = [person];
+	}
+
+	return grouped;
+},{});
+
+function sortObject(object) {
+    return Object.keys(object).sort().reduce(function (result, key) {
+        result[key] = object[key];
+        return result;
+    }, {});
+}
+
+console.log(sortObject(groupedPeople));