var Recurrence = ( function( document, window ) {

	function recurrence() {
		console.info( 'Probable.run(sample_size: e.g. 1000)');
	};

	recurrence.prototype.run = function( sample_size = 1000 ) {
		var sample_array = [];
		var sample_array_unique = [];
		for ( var sample_index = 0; sample_index < sample_size; sample_index++ ) {
			var random_number = Math.floor((Math.random() * sample_size) + 1);
			sample_array.push(random_number);
			if ( sample_array_unique.indexOf(random_number) === -1 ) {
				sample_array_unique.push(random_number);
			}
			console.info( sample_index, sample_array_unique.length / sample_array.length * 100, sample_array, sample_array_unique );
			// console.info( sample_index, this.unique( sample_array ).length / sample_array.length * 100, sample_array, sample_array_unique );
		}
		console.log( sample_array_unique.length / sample_array.length * 100 );
		// console.log( this.unique( sample_array ).length / sample_array.length * 100 );
	};

	recurrence.prototype.unique = function( array ) {
		return array.filter( unique );
	}

	function unique( value, index, self ) {
		return self.indexOf(value) === index;
	};

	return recurrence;

} )( document, window );

var recurrence = new Recurrence();