Creating a Custom toString() Method : String : Language Basics JAVASCRIPT DHTML TUTORIALS

JAVASCRIPT DHTML TUTORIALS » Language Basics » String »

Creating a Custom toString() Method



/*
JavaScript Bible, Fourth Edition
by Danny Goodman 

John Wiley & Sons CopyRight 2001
*/


<HTML>
<HEAD>
<TITLE>Custom toString()</TITLE>
<SCRIPT LANGUAGE="JavaScript">
function customToString() {
    var dataArray = new Array()
    var count = 0
    for (var i in this) {
        dataArray[count++] = this[i]
        if (count > 2) {
            break
        }
    }
    return dataArray.join(",")
}
var book = {title:"The Aeneid", author:"Virgil", pageCount:543}
book.toString = customToString
</SCRIPT>
</HEAD>
<BODY>
<B>A user-defined toString() result:</B>
<HR>
<SCRIPT LANGUAGE="JavaScript">
document.write(book.toString())
</SCRIPT>
</BODY>
</HTML>