the-obelisk/app/World/Classes/RandomDungeons/RandomCoordinateGenerator.ts

class RandomCoordinateGenerator {
    private definedCoordinates = [];

    public generate (minX : number, maxX : number, minY : number, maxY : number) {
        let coordinates : Array<number>;
        do {
            coordinates = [randomRange(minX, maxX), randomRange(minY, maxY)];
        } while (this.definedCoordinates.includes(coordinates.join(";")));
        this.definedCoordinates.push(coordinates.join(";"));
        return coordinates;
    }
}