functionChaining.js

'use strict';

/**
 * Exports
 */

exports = module.exports = container;

/**
 * Function chaining example
 *
 * The function returns the object with the modified values,
 * thus allowing for method chaining. Makes for a clean,
 * functional syntax.
 *
 *   container.add(5).add(4)
 *    -> 9
 */

function container() {
  if (!(this instanceof container)) return new container;
  this.value = 0;
};

/**
 * Add number
 *
 * @param {Number} num
 * @return {Number}
 * @api public
 */

container.prototype.add = function(num) {
  this.value += num;
  return this;
}

/**
 * Log to console
 *
 * Remember to call the object with 'container()', else 
 * most properties won't be initialized.
 */

console.log(container().add(5).add(4));