Sha256: ccdd392d87c6cdecc62fc5e6cd3d63f8a5ac78049cc30517a692f98a002df225
Contents?: true
Size: 864 Bytes
Versions: 116
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Stored size: 864 Bytes
Contents
var BigInt = require('./big-integer');
/**
* @author github.com/nonsensery
* @class Grains
*
* @classdesc 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.
* @param {number} num - the value to square
* @return {number} the square of num
*/
Grains.prototype.square = function (num) {
return new BigInt(2).pow(num - 1).toString();
};
/**
* Gets the total number of grains on all squares.
* @return {string} the total
*/
Grains.prototype.total = function () {
var total = new BigInt(0);
for (var squareNum = 1; squareNum <= 64; ++squareNum) {
total = total.add(this.square(squareNum));
}
return total.toString();
};
module.exports = Grains;
Version data entries
116 entries across 116 versions & 1 rubygems