QueryArray Core

The first thing we want to do is an initial object design (which can be changed and improved later).

Our design is simple: A query array has one instance variable (ivar) "elements" (a fixed array).

Our QueryArray will be a wrapper (decorator) of a fixed array:

QueryArray
	elements (an ivar that is a fixed array)

Core Code

Here is the core of the QueryArray class.

Class name
Public constructor
Instance variable (elements )
Common toString method

class QueryArray {

	//---------------------------------
	//Instance Variables

	//elements --an ivar that is a fixed array

	//---------------------------------
	//Constructors

	static from(elements) {
		return new this(elements);
	}

	constructor(elements) {
		this.elements = elements;
	}

	//---------------------------------
	//Core

	toString() {
		return this.elements.toString();
	}

}

//Test It
let array = [10, 20, 30, 40];
let qarray = new QueryArray(array);
println(qarray.toString());