coded-calc

Coded-Calculator

Getting Started

This application is a single input calculator, similar to a simple handheld model, implemented as a CLI tool. The buttons of the calculator have been mocked with coded values (see below).

-------------------------           -------------------------------
|                       |           |                             |
|       -BUTTONS-       |           |         -KEY CODES-         |
|                       |           |                             |
-------------------------           -------------------------------
|   AC/C    | +/- |  +  |           | ALL_CLR/CLR   | SIGN  | ADD |
-------------------------           -------------------------------
|  1  |  2  |  3  |  -  |           | ONE   | TWO   | THREE | SUB |
-------------------------   ---->   -------------------------------
|  4  |  5  |  6  |  x  |           | FOUR  | FIVE  | SIX   | MUL |
-------------------------           -------------------------------
|  7  |  8  |  9  |  /  |           | SEVEN | EIGHT | NINE  | DIV |
-------------------------           -------------------------------
|     0     |  .  |  =  |           | ZERO          | DEC   | EQ  |
-------------------------           -------------------------------

EXT - Exit the application

Terminal view:

---------------
|           0 |
---------------
Enter Command: FIVE
---------------

---------------
|           5 |
---------------
Enter Command: TWO
---------------

---------------
|           52 |
---------------
Enter Command: ADD
---------------

---------------
|           52 |
---------------
Enter Command: SIX
---------------

---------------
|           6 |
---------------
Enter Command: EQ
---------------

---------------
|           58 |
---------------
Enter Command:
---------------

#TODO

• [ ] Finish writing tests
• [ ] Publish to NPM Repo
• [ ] Utility scripts for display last session to CLI, clearing logs, etc
• [ ] add .dockerfile

Folder Structure

• calculator
  • data
  • tests
  • utils
  • calculator.js
• cmds
• interface
  • data
  • tests
  • utils
  • interface.js
• index.js

Commands

Numeric Buttons

• ONE, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, ZERO

Clear Buttons

• CLR - will only clear the second value (addend, subtrahend, multipier, divisor) if present, otherwise will clear all memory. Memory cache is not cleared
• ALL_CLR - will clear all memory including the memory cache

Operand Buttons

• ADD, SUB, MUL, DIV

Other Buttons

• DEC - adds a decimal to the current value
• SIGN - flips the sign of the current value

Read the test cases for more information on application functionality