Solution added

cinemaTickets.js

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+function createLocation(x, y) {
+    'use strict';
+    return { x: x, y: y };
+}
+
+function getDistance(location1, location2) {
+    'use strict';
+    return Math.sqrt((location1.x - location2.x) * (location1.x - location2.x) +
+        (location1.y - location2.y) * (location1.y - location2.y));
+}
+
+function createUser(location, options) {
+    'use strict';
+    options = options || {};
+    return {
+        location: location,
+        name: options.name || "Username",
+        age: options.age || 0
+    };
+}
+
+//name is string
+function createFilm(name, options) {
+    'use strict';
+    options = options || {};
+    return {
+        name: name,
+        minimumAge: options.minimumAge || 0
+    };
+}
+
+
+//time in format hh:mm
+//dayOfWeek in ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
+function getDate(dayOfWeek, time) {
+    'use strict';
+    var dayOfMonth = {
+        'Mon': 5,
+        'Tue': 6,
+        'Wed': 7,
+        'Thu': 1,
+        'Fri': 2,
+        'Sat': 3,
+        'Sun': 4
+    };
+    return new Date(dayOfWeek + ', 0' + dayOfMonth[dayOfWeek] + ' Jan 1970 ' + time + ':00');
+}
+
+//time is a Datetime object (only hours and minutes and have a meaning)
+function createSession(dayOfWeek, time, ticketCount, ticketPrice) {
+    'use strict';
+    return {
+        date: getDate(dayOfWeek, time),
+        ticketCount: ticketCount,
+        ticketPrice: ticketPrice
+    };
+}
+
+//sessions is an array of sessions
+function createTimetable(film, sessions) {
+    'use strict';
+    return {
+        film: film,
+        sessions: sessions
+    };
+}
+
+//timetables is an object array of timetables
+function createCinema(name, location, timetables) {
+    'use strict';
+    return {
+        name: name,
+        location: location,
+        timetables: timetables
+    };
+}
+
+function laterToday(date1, date2) {
+    'use strict';
+    if (date1.getDay() !== date2.getDay()) {
+        return false;
+    }
+    if (date1.getHours() < date2.getHours()) {
+        return false;
+    }
+    if (date1.getHours() === date2.getHours() && date1.getMinutes() <= date2.getMinutes()) {
+        return false;
+    }
+    return true;
+}
+
+function filterTodaySessions(cinemas, date) {
+    'use strict';
+    var i, j, newCinemas = [], cinema, newTimetables, timetable, newSessions,
+        sessionFilter = function (session) {
+            return laterToday(session.date, date);
+        };
+    for (i = 0; i < cinemas.length; i += 1) {
+        cinema = cinemas[i];
+        newTimetables = [];
+        for (j = 0; j < cinema.timetables.length; j += 1) {
+            timetable = cinema.timetables[j];
+            newSessions = timetable.sessions.filter(sessionFilter);
+            if (newSessions.length !== 0) {
+                newTimetables.push(createTimetable(timetable.film, newSessions));
+            }
+        }
+        if (newTimetables.length !== 0) {
+            newCinemas.push(createCinema(cinema.name, cinema.location, newTimetables));
+        }
+    }
+    return newCinemas;
+}
+
+function filterByFilmName(cinemas, name) {
+    'use strict';
+    var newCinemas = [], i, cinema, newTimetables,
+        filmFilter = function (timetable) {
+            return timetable.film.name === name;
+        };
+    for (i = 0; i < cinemas.length; i += 1) {
+        cinema = cinemas[i];
+        newTimetables = cinema.timetables.filter(filmFilter);
+        if (newTimetables.length !== 0) {
+            newCinemas.push(createCinema(cinema.name, cinema.location, newTimetables));
+        }
+    }
+    return newCinemas;
+}
+
+function sortByUserLocation(cinemas, user) {
+    'use strict';
+    return cinemas.sort(function (cinema1, cinema2) {
+        return getDistance(cinema1.location, user.location) -
+            getDistance(cinema2.location, user.location);
+    });
+}
+
+function getTop(cinemas, count) {
+    'use strict';
+    return cinemas.slice(0, count);
+}
+
+Array.prototype.filterTodaySessions = function (date) {
+    'use strict';
+    return filterTodaySessions(this, date);
+}
+
+Array.prototype.filterByFilmName = function (name) {
+    return filterByFilmName(this, name);
+}
+
+Array.prototype.sortByUserLocation = function (user) {
+    return sortByUserLocation(this, user);
+}
+
+Array.prototype.getTop = function (count) {
+    return getTop(this, count);
+}
+
+function testSetUp() {
+    var film1, film2, timetable1, timetable2, timetable3, timetable4, cinema1, cinema2;
+    film1 = createFilm('Godzilla');
+    film2 = createFilm('King-Kong');
+    timetable1 = createTimetable(film1, [
+        createSession('Mon', '12:00', 100, 100),
+        createSession('Tue', '13:00', 100, 100)
+    ]);
+    timetable2 = createTimetable(film2, [
+        createSession('Wed', '14:00', 100, 100),
+        createSession('Thu', '15:00', 100, 100)
+    ]);
+    timetable3 = createTimetable(film1, [
+        createSession('Fri', '16:00', 100, 100),
+        createSession('Sat', '17:00', 100, 100)
+    ]);
+    timetable4 = createTimetable(film2, [
+        createSession('Sun', '10:00', 100, 100),
+        createSession('Sun', '11:00', 100, 100)
+    ]);
+    cinema1 = createCinema('BigCinema', createLocation(0, 0), [timetable1, timetable2]);
+    cinema2 = createCinema('SmallCinema', createLocation(100, 100), [timetable3, timetable4]);
+    return [cinema1, cinema2];
+}
+
+function assert(testName, statement) {
+    if (statement)
+        console.log(testName + ' passed.');
+    else
+        console.log(testName + ' failed.');
+}
+
+function test1() {
+    var cinemas = testSetUp(), user;
+    user = createUser(createLocation(10, 10));
+    cinemas = cinemas
+        .sortByUserLocation(user);
+    assert('test1', cinemas[0].name === 'BigCinema');
+}
+
+function test2() {
+    var cinemas = testSetUp(), cinema;
+    cinemas = cinemas.filterTodaySessions(getDate('Sun', '10:30'));
+    cinema = cinemas[0];
+    assert('test2', cinema.timetables[0].sessions[0].date.getHours() === 11);
+}
+
+function test3() {
+    var cinemas = testSetUp().filterByFilmName('Godzilla');
+    assert('test3', cinemas[0].timetables.length == 1 && cinemas[1].timetables.length == 1);
+}
+
+window.onload = function() {
+    'use strict';
+    test1();
+    test2();
+    test3();
+}
+

index.html

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+<!DOCTYPE html>
+<html>
+<head>
+	<title>Cinema Tickets</title>
+</head>
+<body>
+<script src="cinemaTickets.js"></script>
+</body>
+</html>