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@kingjs/enumerable.odometer

Generates arrays of odometer digits.

Usage

A typical car odometer has 7 wheels, each wheel has 10 digits, and a new value is generated as the car moves along. These values can be generated for 11 units of distance like this:

var odometer = require('@kingjs/enumerable.odometer')

var enumerable = odometer([10, 10, 10, 10, 10, 10, 10]);
var enumerator = enumerable.getEnumerator();

var actual = [];
for (var distance = 0; distance < 11; distance++) {
  enumerator.moveNext();
  var current = enumerator.current;
  actual.push(current.reverse());
}

actual;

result:

[
  [0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 1],
  [0, 0, 0, 0, 0, 0, 2],
  [0, 0, 0, 0, 0, 0, 3],
  [0, 0, 0, 0, 0, 0, 4],
  [0, 0, 0, 0, 0, 0, 5],
  [0, 0, 0, 0, 0, 0, 6],
  [0, 0, 0, 0, 0, 0, 7],
  [0, 0, 0, 0, 0, 0, 8],
  [0, 0, 0, 0, 0, 0, 9],
  [0, 0, 0, 0, 0, 1, 0],
];

API

function odometer(
  bases?: number[]
): Enumerable

Interfaces

• Enumerable: See @kingjs/enumerable.define.

Parameters

• bases: an array of normal numbers specifying the number of digits on each wheel of the odometer at each position. May also be passed as an argument list.

Return Value

Returns a sequence of arrays composed of the digits produced by an odometer of the specified number of digits and bases. The generator terminates after every combination has been generated.

Remarks

A typical odometer increments digits from right to left however odometer increments from left to right so digits increment starting at index 0.

Install

With npm installed, run

$ npm install @kingjs/enumerable.odometer

License

MIT