This, self, and Me are used in some computer to refer to the object, class, or other entity of which the currently running code is a part. The entity referred to by these keywords thus depends on the (such as which object is having its method called). Different programming languages use these keywords in slightly different ways. In languages where a keyword like 'this' is mandatory, the keyword is the only way to access data and methods stored in the current object. Where optional, they can disambiguate variables and functions with the same name. Contents • • • • • • • • • • • • • • • • • • • Object-oriented programming [ ] In many, this (also called self or Me) is a variable that is used in to refer to the object on which they are working. And languages which derive in style from it (such as,,, and ) generally use this.

And others, such as,,,,,, and, use self. Microsoft's uses Me.

The concept is similar in all languages: this is usually an immutable or which refers to the current object; the current object often being the code that acts as 'parent' to the,, sub-routine or function that contains the this keyword. After an object is properly constructed, or instantiated, this is always a valid reference.

Print This Page. How to& Exercises. Positive Self Programming. Most things that you hear will tell you how to hypnotize your self; use positive affirmations. SOFTWARE: THE SELF-PROGRAMMING MACHINE. Mahoney Princeton University (Published in From 0 to 1: An Authoritative History of Modern Computing, ed.

Some languages require it explicitly; others use to use it implicitly to make symbols within their class visible. Or alternatively, the current object referred to by this may be an independent code object that has called the function or method containing the keyword this. Such a thing happens, for example, when a event handler attached to an HTML tag in a web page calls a function containing the keyword this stored in the global space outside the document object; in that context, this will refer to the page element within the document object, not the enclosing window object.

In some languages, for example C++ and Java, this or self is a, and the variable automatically exists in instance methods. In others, for example,, and 5, the first parameter of an instance method is such a reference. Ssti Pedal Power Rp Program. It needs to be specified explicitly. In that case, the parameter need not necessarily be named this or self; it can be named freely by the programmer like any other parameter.