Sudoku generator for node

Install

(note: not yet on npm)

$ npm install --save sudoku-generator

Usage as library

var sudoku = require('sudoku-generator');

sudoku(9, 6); ## 9x9 grid with 6 numbers removed per row
sudoku(6, 3); ## 6x6 grid with 3 numbers removed per row

//example output
{
    solution: [
        [ 3, 1, 2, 4, 5, 6 ],
        [ 6, 4, 5, 1, 2, 3 ],
        [ 1, 5, 6, 2, 3, 4 ],
        [ 4, 2, 3, 5, 6, 1 ],
        [ 2, 6, 1, 3, 4, 5 ],
        [ 5, 3, 4, 6, 1, 2 ]
    ],
    size:6,
    sectionWidth:3,
    sectionHeight:2,
    puzzle: [
        [ 3, null, 2, null, null, 6 ],
        [ null, 4, 5, 1, null, null ],
        [ null, null, null, 2, 3, 4 ],
        [ 4, 2, null, null, 6, null ],
        [ null, null, null, 3, 4, 5 ],
        [ null, 3, 4, 6, null, null ]
    ]
}

Usage as command line (use --help to show options)

requires: NodeJS - https://nodejs.org/ Grunt - https://github.com/gruntjs/grunt-cli

    $ ./sudoku-generator.js 6 --show-solution


      [[_ _ 6 _ 3 _]
       [2 _ _ 5 _ _]
       [6 _ _ 3 _ _]
       [3 _ 4 _ _ _]
       [4 _ _ _ _ 6]
       [_ 6 _ _ 5 _]]

      [[5 4 6 2 3 1]
       [2 1 3 5 6 4]
       [6 5 1 3 4 2]
       [3 2 4 6 1 5]
       [4 3 5 1 2 6]
       [1 6 2 4 5 3]]

Dev Notes

    npm install  # install dependencies

    grunt test # run jslint and unit tests

    grunt coverage # run coverage report

    grunt watch # watches files and runs unit tests on changed files.

Unit test and coverage tests are wired up to TravisCI and run on every push.

License

MIT © David Lai