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JavaScript Object-Oriented JavaScript: Challenge Building Constructor Methods and Generating Objects createSpaces() Method Solution

Posted by David Aguirre
David Aguirre
8,170 Points

How const space = new Space(x,y) is created?

I want to ask the relationship between the variable space and the space class that is created in the Space.js file.

There is no relationship between then?

By using new Spaces (x,y) - does this means that the browser will read this as the updated Space class ?

new Space(x,y) - is similar to creating a class and a constructor all in that single line?

I would like to advance this course but I don't think this was explained well.

2 Answers

Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

The relationship is that "Space" is the class, and "space" is the variable that is assigned an instance of that class.

The "new" keyword creates an instance of a class. It runs the constructor as part of making the new object.

It might help to think of a class as a kind of blueprint for how to make an object. It's not an object itself, but you can use it to make one.

David Aguirre
David Aguirre
8,170 Points

I think I mistyped a couple of things.

For instance the Space class created in the Space.js file and the instance you are referring to new Spaces are related right?

If not then this is making a class from scratch by doing " new Space (x,y)" and by making this statement with parenthesis after that is like putting a constructor method?

Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

You're not making a class here, the class was already made in the other file. You are making an instance object using that class as the "blueprint".

And yes, the constructor is invoked in the creation process.

Theresa Secore
Theresa Secore
7,001 Points
Theresa Secore
Theresa Secore
7,001 Points

If still unclear, think of Space class in Space.js as the 'original' object and variable space as the copy of that object, and variable space has to adhere by all the rules (ie constructor parameters) when replicating itself and inheriting all the characteristics (ie. all the properties of Space class in the constructor and methods outside of the constructor) of the 'original' object (Space class in Space.js). You can replicate (instantiate) a new Space class object in any file as you see fit to use by using the keyword 'new' (ie new Space())