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what is 'this' keyword and what's its functions?

user432002
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    java or javascript? – Adam Sep 03 '10 at 16:09
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    The pity upvote is atrocious, whoever cast it. Remember that when you upvote, you're saying "this question is useful and clear". It's neither. – Andy E Sep 03 '10 at 16:15
  • this == homework, there's no way it could not be. @vikash: Please do not post questions (especially homework!) without showing that you have put some effort into them. – Tomalak Sep 03 '10 at 16:15

4 Answers4

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The this keyword refers to the current object in the context in which the keyword appears.

Here's an article with more: http://www.quirksmode.org/js/this.html

FrustratedWithFormsDesigner
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In Java this refers to the object you are currently in. See http://download.oracle.com/javase/tutorial/java/javaOO/thiskey.html

In JavaScript that is true as well, but in a function it can mean the "owner" of a function or the global object (ie window). See http://www.quirksmode.org/js/this.html

Adam
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The this refers as to the object you are currently in. For example, if your object has a method called doSomething(), you could call the method , from another method in your class by doing:

this.doSomething();

Hope this helps.

Live
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this refers to the current object, so its methods are those defined by the class that the current object is an instance of.

Rowland Shaw
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