_hiddenSource_
class QueryArray {
	// -----------------------------------------------------
	//Instance Variables (Ivars)

	//this.elements -- a fixed array holding the elements

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

	/** Static factory methods that returns new QueryArray using
	the passed fixed array "array" */
	static from(array) {
		//Call traditional constructor
		return new this(array);
	}

	/** Traditional constructor -- set ivar elements to passed array */
	constructor(array) {
		this.elements = array;
	}

	// -----------------------------------------------------
	//Instance Methods

	/** Returns nice display string */
	toString() {
		return this.elements.toString();
	}

	forEach(actionFct) {
		for (let nextElem of this.elements)
			actionFct(nextElem);
	}

	/** Prints all elements to console (with newline after each */
	printAll(listLabel) {
		println(listLabel);
		this.forEach(nextElem => println(nextElem.toString()));
	}

}

//Try It

//fixed array and query array
var farray, qarray;

//Example data (list of cities)
farray = City.newSampleSet1();

//Construct QueryArray
qarray = QueryArray.from(farray );

//Print It
qarray.printAll();
_hiddenSource_ _br_ _br_forEach(actionFct) {
	for (let nextElem of this.elements)
		actionFct(nextElem);
}

/** Prints all elements to console (with newline after each */
printAll(listLabel) {
	println(listLabel);
	this.forEach(nextElem => println(nextElem.toString()));
}