Choice1 isValid() {

  $data1 = $this->a->data1;

  $data2 = $this->a->data2;

  $data3 = $this->a->b->data3;

  $data4 = $this->a->b->data4;

  return ...some expression of data1-4...;

}

The JavaScript Programming Language

Douglas Crockford: "The JavaScript Programming Language"/1 of 4 [M4V download]

Douglas Crockford: "The JavaScript Programming Language"/2 of 4 [M4V download]

Douglas Crockford: "The JavaScript Programming Language"/3 of 4 [M4V download]

Douglas Crockford: "The JavaScript Programming Language"/4 of 4 [M4V download]

An Inconvenient API: The Theory of the DOM

Douglas Crockford: "Theory of the DOM" (1 of 3) [M4V download]

Douglas Crockford: "Theory of the DOM" (2 of 3) [M4V download]

Douglas Crockford: "Theory of the DOM" (3 of 3) [M4V download]

Advanced JavaScript

Douglas Crockford: "Advanced JavaScript" (1 of 3) [M4V download]

Douglas Crockford: "Advanced JavaScript" (2 of 3) [M4V download]

Douglas Crockford: "Advanced JavaScript" (3 of 3) [M4V download]

At the beginning of this book I will be focusing on a discussion about the importance and history of design patterns in any programming language. If you're already sold on or are familiar with this history, feel free to skip to the chapter 'What is a Pattern?' to continue reading.