rhyolight

Rectangle = function(w,h) {
    return {
        width: w,
        height: h,
        area: function() { return w * h },
    };
};

rhyolight

var rect = new Rectangle(2,3);
document.write('area: ' + rect.area() + '<br/>');

rhyolight

var rect = new Rectangle(2,3);
document.write('area : ' + rect.area() + '<br/>');
rect.width = 5;
document.write('area : ' + rect.area() + '<br/>');

rhyolight

area: function() { return w * h }

rhyolight

area: function() { return this.width * this.height }

rhyolight

Rectangle = function(w,h) {
    return {
        width: w,
        height: h,
        area: function() { return this.width * this.height },
        toString: function() { return '(' + this.width + 'X' + this.height + ')' }
    };
};

rhyolight

var rect = new Rectangle(2,3);
document.write('area of ' + rect + ': ' + rect.area() + '<br/>');
rect.width = 5;
document.write('area of ' + rect + ': ' + rect.area() + '<br/>');

rhyolight

Rectangle = function(w,h) {
    var width = w, height = h;
    return {
        getWidth: function() { return width; },
        getHeight: function() { return height; },
        setWidth: function(w) { width = w; },
        setHeight: function(h) { height = h; },
        area: function() { return width * height },
        toString: function() { return '(' + width + 'X' + height + ')' }
    };

rhyolight

var rect = new Rectangle(2,3);
document.write('area of ' + rect + ': ' + rect.area() + '<br/>');
rect.setWidth(5);
document.write('area of ' + rect + ': ' + rect.area() + '<br/>');

rhyolight

Rectangle.prototype.perimeter = function() { 
    return 2 * this.getWidth() + 2 * this.getHeight();
};