This is a minimalistic functional version of the Toy Robot problem written in Javascript (2016). It was written to be coherence and cohesion, without using any external libs or transpilers.

Problem Description:

Description:

The application is a simulation of a toy robot moving on a square
tabletop, of dimensions 5 units x 5 units.

There are no other obstructions on the table surface.

The robot is free to roam around the surface of the table, but must be
prevented from falling to destruction.  Any movement that would result
in the robot falling from the table must be prevented, however further
valid movement commands must still be allowed.

Create an application that can read in commands of the following form -

PLACE X,Y,F
MOVE
LEFT
RIGHT
REPORT

Where PLACE will put the toy robot on the table in position X,Y and
facing NORTH, SOUTH, EAST or WEST.  The origin (0,0) can be considered to
be the SOUTH WEST most corner.

It is required that the first command to the robot is a PLACE command,
after that, any sequence of commands may be issued, in any order, including
another PLACE command.  The application should discard all commands in
the sequence until a valid PLACE command has been executed.

Where MOVE will move the toy robot one unit forward in the direction
it is currently facing.

Where LEFT and RIGHT will rotate the robot 90 degrees in the specified
direction without changing the position of the robot.

Where REPORT will announce the X,Y and F of the robot.  This can be
in any form, but standard output is sufficient.

A robot that is not on the table can choose the ignore the MOVE, LEFT,
RIGHT and REPORT commands.

Input can be from a file, or from standard input, as the developer chooses.

Provide test data to exercise the application.

Constraints:

The toy robot must not fall off the table during movement.  This also
includes the initial placement of the toy robot.  Any move that would cause
the robot to fall must be ignored.

Example Input and Output:

a)----------------
PLACE 0,0,NORTH
MOVE
REPORT

Output: 0,1,NORTH

b)----------------
PLACE 0,0,NORTH
LEFT
REPORT

Output: 0,0,WEST
c)----------------
PLACE 1,2,EAST
MOVE
MOVE
LEFT
MOVE
REPORT

Output: 3,3,NORTH

Deliverables:

The source files, the test data and any test code.

It is not required to provide any graphical output showing the movement
of the toy robot.