Contents

var BigInt = require('./big-integer');

/**
 * @author github.com/nonsensery
 * @class Grains
 *
 * Computes the number of grains on the squares of a
 * chess board, starting with one grain on the first
 * square, and doubling with each successive square.
 */
function Grains() {
  // no op!
}

/**
 * Gets the number of grains on the nth square.
 */
Grains.prototype.square = function(num) {
  return BigInt(2).pow(num - 1).toString();
};

/**
 * Gets the total number of grains on all squares.
 */
Grains.prototype.total = function () {
  var total = BigInt(0);

  for (var squareNum = 1; squareNum <= 64; ++squareNum) {
    total = total.add(this.square(squareNum));
  }

  return total.toString();
};

module.exports = Grains;

Version data entries

255 entries across 255 versions & 1 rubygems

Version	Path
trackler-2.2.1.37	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.36	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.35	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.34	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.33	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.32	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.31	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.30	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.29	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.28	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.27	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.26	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.25	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.24	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.23	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.22	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.21	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.20	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.19	tracks/javascript/exercises/grains/example.js
trackler-2.2.1.18	tracks/javascript/exercises/grains/example.js