Basic HTML version of Foils prepared 3 March 99

Foil 125 The prototype Property

From Overview of JavaScript I -- Basic Web Scripting Language CPS616 Technologies of the Information Age -- Spring Semester 99. by Geoffrey C. Fox (Tom Scavo)
1 Methods may be added after the fact: function Circle_area() { return Math.PI * this.r * this.r; } Circle.prototype.area = Circle_area;
2 Use the previous method as follows: var radius = 1/Math.sqrt( Math.PI ); var c = new Circle( radius ); var area = c.area();
in Table To:

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