var range = require('range.js');

var range = require('range.js');

// Plain syntax:
range(from, to, step);
// Ruby style syntax:
range('from..to', step);

range(1, 5); // [1, 2, 3, 4, 5]
range(-2, 2); // [-2, -1, 0, 1, 2]
range(0, 0.5, 0.1); // Approximately, JS floats are not exact: [0.1, 0.2, 0.3, 0.4, 0.5]

range('a', 'd'); // ['a', 'b', 'c', 'd']
range('A', 'D'); // ['A', 'B', 'C', 'D']
range('y', 'B'); // ['y', 'z', 'A', 'B']
range('Y', 'b'); // ['Y', 'Z', 'a', 'b']

range(0, 9, 3); // [0, 3, 6, 9]
range('a', 'e', 2); // ['a', 'c', 'e']

range(5, 0); // [5, 4, 3, 2, 1, 0]
range('e', 'a'); ['e', 'd', 'c', 'b', 'a']

range('1..5'); // range(1, 5)
range('a..z'); // range('a', 'z')
// Steps:
range('1..5', 2); // range(1, 5, 2)
// Exclusive ranges:
range('1...5'); // [1, 2, 3, 4]

var a = range(1, 5);
var b = range(1, 5);
var c = range('a..z');
range.equals(a, b); // true
range.equals(a, c); // false

range.overlaps(range('a..z'), range('e..f')); // true
range.overlaps(range(1, 10), range(1, 9)); // true
range.overlaps(range(1, 5), range(6, 10)); // false