Manhattan Distance

Manhattan distance is the distance between two points in a grid (like the grid-like street geography of the New York borough of Manhattan) calculated by only taking a vertical and/or horizontal path.

Write a function int manhattanDistance(Point, Point) that returns the Manhattan Distance between the two points.

Potential constraints

• The class Point is immutable
• The class Point has no Getters, no Setters
• The class Point has no public properties (i.e. the internal state cannot be read from outside the class).

Suggested tests

• manhattanDistance( Point(1, 1), Point(1, 1) ) should returns 0
• manhattanDistance( Point(5, 4), Point(3, 2) ) should returns 4
• manhattanDistance( Point(1, 1), Point(0, 3) ) should returns 3