Javascript 1.3

by S.Luann

javascript 1.3 allows to create an object from a multitude of functions, rather that just one as with javascript 1.2,

by introducing two new methods in Function object. This feature is somehow a way to implement inheritance.

function Person(){
this.name = name;
this.title = title;
}

function Programmer(){
this.skillSet = skillSet;
this.experience = experience;
Person.apply(this, arguments);
}


the only difference between call() and apply is that call needs list each single parameters.

function Person(name, title){
this.name = name;
this.title = title;
}

function Programmer(name, title, skillSet, experience){
this.skillSet = skillSet;
this.experience = experience;
Person.call(this, name, title);
}

to list all the properties of an object

var programmer = new Programmer()
foreach(int i=0; i < programmer[].length; i++){
document.writeline(programmer[i].name);
}

Handle version difference
<scritp language="javascript1.2">

by default with browsers navigator 4.01 and after, language is 1.3

Among other features that 1.3 brings, strict equal operator (===, !==), lamda expression in replace method, modified toString method, modified Boolean object, modified Array object and modified equality operator.

toString of an object
function Student(name, major){
this.name = name;
this.major = major;
}

var jenny = new Student("Jenny", "Math");
document.write(jenny.toString());

the output with 1.2:
{name:"Jenny", major:"Math"}

while with 1.3:
{object Object}


toString() method in Array

var a = new Array(1,3,4,5);
document.write(a.toString());

the output with 1.2:
[1, 3, 4, 5]

while the output with 1.3:
1,3,4,5