前回に引き続き、prototype.jsを読んでいく。これを通じてJavaScriptプログラミングのポイントを確認していこう。

Get tips for instantiating JavaScript's prototype-based objects two ways: via constructor functions or object initialization.

Built-in JavaScript objects and functions are ones you'll use all the time. Here's how to use Object, JSON, String, Math, Date, and console in your JavaScript programs.