Basic HTML version of Foils prepared 3 March 99

Foil 126 The prototype Property (cont'd)

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 We can add methods to built-in objects, too: // Does an array contain element x ? function contains( x ) { for (var i=0; i<this.length; i++) { if (this[i] == x) return true; } return false; }
2 Now add the method to the Array object with the prototype property: Array.prototype.contains = contains;
in Table To:

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