Читать, искать и сортировать все значения CSV без дубликатов

Выбор жанра

http://jsfiddle.net/coma/4N676/25/

var movies = new Movies(JSON.parse(gists.files.Movies.content));
var html = '<option>Filter by genre</option>';

movies.getGenres().forEach(function(genre) {

    html += '<option value="' + genre + '">' + genre + '</option>';
});

$('#genre')
    .html(html)
    .change(function() {

        var list = movies
            .reset()
            .filterByGenre(this.value)
            .sortByTitleAsc()
            .getList();

        alert(JSON.stringify(list));
    });

http://jsfiddle.net/coma/4N676/

База

var Movies = function(movies)
{
    var genres = [];
    var ratingMin = Infinity;
    var ratingMax = -1;
    var yearMin = Infinity;
    var yearMax = -1;

    movies.forEach(function(movie, movieIndex) {

        movie.Genre  = movie.Genre.split(', ');
        movie.Rating = parseFloat(movie.Rating);
        movie.Year = parseInt(movie.Year, 10);

        ratingMin = Math.min(movie.Rating, ratingMin);
        ratingMax = Math.max(movie.Rating, ratingMax);

        yearMin = Math.min(movie.Year, yearMin);
        yearMax = Math.max(movie.Year, yearMax);

        movie.Genre.forEach(function(genre, genreIndex) {

            genre = $.trim(genre).toLowerCase();
            movie.Genre[genreIndex] = genre;

            if (genres.indexOf(genre) < 0) {

                genres.push(genre);
            }

            genres.sort();
        });
    });

    this.original  = movies;
    this.list      = movies.slice();
    this.ratingMin = ratingMin;
    this.ratingMax = ratingMax;
    this.yearMin   = yearMin;
    this.yearMax   = yearMax;
    this.genres    = genres;
};

Movies.prototype.reset = function()
{
    this.list = this.original.slice();

    return this;
};

Геттеры

Movies.prototype.getList = function()
{
    return this.list.slice();
};

Movies.prototype.getRatingRange = function()
{
    return [this.ratingMin, this.ratingMax];
};

Movies.prototype.getRatingMax = function()
{
    return this.ratingMax;
};

Movies.prototype.getRatingMin = function()
{
    return this.ratingMin;
};

Movies.prototype.getYearRange = function()
{
    return [this.yearMin, this.yearMax];
};

Movies.prototype.getYearMax = function()
{
    return this.yearMax;
};

Movies.prototype.getYearMin = function()
{
    return this.yearMin;
};

Movies.prototype.getGenres = function()
{
    return this.genres.slice();
};

фильтры

Movies.prototype.filterByNumbers = function(property, number)
{
    if ($.isNumeric(number)) {

        this.list = this.list.filter(function(movie) {

            return movie[property] === number;
        });
    }

    if ($.isArray(number)) {

        this.list = this.list.filter(function(movie) {

            return movie[property] >= number[0]
                && movie[property] <= number[1];
        });
    }

    return this;
};

Movies.prototype.filterByGenre = function(genre)
{
    this.list = this.list.filter(function(movie) {

        return movie
            .Genre
            .indexOf(genre.toLowerCase()) >= 0;
    });

    return this;
};

Movies.prototype.filterByTitle = function(title)
{
    this.list = this.list.filter(function(movie) {

        return movie
            .Title
            .toLowerCase()
            .indexOf(title.toLowerCase()) >= 0;
    });

    return this;
};

Movies.prototype.filterByYear = function(year)
{ 
    this.filterByNumbers('Year', year);

    return this;
};

Movies.prototype.filterByRating = function(rating)
{ 
    this.filterByNumbers('Rating', rating);

    return this;
};

Сортировщики

Movies.prototype.sortAsc = function(property)
{ 
    this.list.sort(function(a, b) {

        return a[property] > b[property];
    });

    return this;
};

Movies.prototype.sortDesc = function(property)
{ 
    this.list.sort(function(a, b) {

        return a[property] < b[property];
    });

    return this;
};

Movies.prototype.sortByTitleAsc = function()
{ 
    this.sortAsc('Title');

    return this;
};

Movies.prototype.sortByTitleDesc = function()
{ 
    this.sortDesc('Title');

    return this;
};

Movies.prototype.sortByYearAsc = function()
{ 
    this.sortAsc('Year');

    return this;
};

Movies.prototype.sortByYearDesc = function()
{ 
    this.sortDesc('Year');

    return this;
};

Movies.prototype.sortByRatingAsc = function()
{ 
    this.sortAsc('Rating');

    return this;
};

Movies.prototype.sortByRatingDesc = function()
{ 
    this.sortDesc('Rating');

    return this;
};

Применение

$.getJSON('https://api.github.com/gists/9803182', function(gists) {

    var movies = new Movies(JSON.parse(gists.files.Movies.content));

    movies
        .filterByGenre('comedy')
        .filterByYear([1954, 2000])
        .sortByTitleDesc();

    console.log('Filtered and sorted', movies.getList());
    console.log('Original', movies.reset().getList());
});