gistify119414.js

var IssueGrades = function( gradedAssignments ) {}
IssueGrades.prototype = {

  run: function() {
    alert('issued!');
    return gradedAssignments;
  }

}

var issueGrades = new IssueGrades( gradedAssignments );
issueGrades.run();



var PrintReportCards = function( issueGrades ) {}
PrintReportCards.prototype = {
  
  print: function() {
    alert('cards printed!');
  },

  run: function() {
    this.issueGrades.run() && this.print();
    return this.issueGrades;
  }

}

var issueGrades = new PrintReportCards( new IssueGrades( gradedAssignments ) );
issueGrades.run();




var EmailReportCards = function( issueGrades ) {}
EmailReportCards = function( issueGrades ) {
  
  email: function() {
    alert('emailed!');
  },

  run: function() {
    this.issueGrades.run() && this.email();
  }

}

var issueGrades = new EmailReportCards( new PrintReportCards( new IssueGrades( gradedAssignments ) ) );
issueGrades.run();




// As opposed to

new IssueGrades( gradedAssignments ).run()
  .then( function( gradedAssignments ) {
    return new PrintReportCards( gradedAssignments ).run();
  })
  .then( function( gradedAssignments ) {
    return new EmailReportCards( gradedAssignments ).run();
  })