How can I define an class' array while constructing it?

Question

If you declare an array, you have to assign its elements (or at least acknowledge that it is an array) while declaring it, i.e., var myArray = [1, 2, 3];.

I'm curious as to how one might be able to implement that in an class constructor, for example:

function Matrix(MultiDimensionalArray) {
    this.array = MultiDimensionalArray;
}
var myMatrix = new Matrix() [
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9]
];

That's the closest thing I could think of to implement this, but I know that it's incorrect. What is the right way to go about this?

You are missing commas(,) after every item. Second, your nested array should be passed between parenthesis. Also, functions are declared as function functionMName(argumentList) { function body} — Rajesh Dixit
– Rajesh Dixit, Commented Nov 30, 2017 at 7:23

ramu · Accepted Answer · 2017-11-30 07:31:09Z

4

Your constructor call would be like this:

 var myMatrix = new Matrix([
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9]
])

edited Nov 30, 2017 at 7:31

answered Nov 30, 2017 at 7:27

ramu

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1 Comment

davidxxx Over a year ago

It is not a constructor but a constructor call.

Rajesh Dixit · Accepted Answer · 2017-11-30 07:33:55Z

There are many syntactical mistakes in your code.

Function declaration

You can declare functions like:

function functionName(argList) {}

or

var functionName = function(argList){}

Passing arguments

You have to put arguments within parenthesis. So it should be Matrix([...])

Array declaration

Items in an array are separated using commas. You will have to do [ [], [], [] ].

variable names

In the following code:

function Matrix = (MultiDimensionalArray) {
    this.array = multiDimensionalArray;

variable accepted and variable assigned are different. You will have to use the same values.

Sample Code:

function Matrix(multiDimensionalArray) {
    this.array = multiDimensionalArray;
}
var myMatrix = new Matrix([
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9]
]);

console.log(myMatrix.array)

Vinod Bhavnani · Accepted Answer · 2017-11-30 07:27:55Z

-1

var myMatrix = new Matrix([[1,2,3],[4,5,6],[7,8,9]]);

answered Nov 30, 2017 at 7:27

Vinod Bhavnani

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5 Comments

Rajesh Dixit Over a year ago

This should have been a comment. You are also missing explanation.

Vinod Bhavnani Over a year ago

I have also commented with an explanation @Rajesh. Please check my comment on his question. Infact I answered after commenting.

Vinod Bhavnani Over a year ago

Also, the answer above me was also the same. I really don't understand this bias.

Rajesh Dixit Over a year ago

@VinodBhavnani I voted your comment as it was correct. But there is a difference between answer and a comment. Also about bias, no one here is anyone's enemy. Your answer looks more like a comment and will attract unwanted voted.

Vinod Bhavnani Over a year ago

"Put the array inside your parenthesis." is a comment. A piece of code showing how to do it, is an answer. I think I am pretty sure I know what a comment and an answer is. Anyways, if you go around downvoting people because you think something is a comment, while it is an answer, you are actually misinterpreted. A piece of code showing how to do it, cannot be a comment. Period!

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