ready-primes-extended
Version:
Get Primes in milliseconds. Pre-calculated collections of prime numbers, natural numbers with distinguished primes and methods to retrieve them.
89 lines (88 loc) • 3.29 kB
JavaScript
;
var Promise = require('bluebird');
var JsonHelper_1 = require('./helpers/JsonHelper');
var MathHelper_1 = require('./helpers/MathHelper');
var _flatten = require('lodash/flatten');
var _slice = require('lodash/slice');
var ReadyPrimes = (function () {
function ReadyPrimes() {
}
ReadyPrimes.getMultiple = function (func, chunks, size, index) {
if (index === void 0) { index = 0; }
return new Promise(function (resolve, reject) {
func(chunks).then(function (data) {
resolve(_slice(_flatten(data), index, size + index));
}).error(function () { return reject; });
});
};
/**
* Returns Promise, which when resolved, returns an Array of Primes of length required (size).
*
* @static
* @param {number} size
* @param {number} [index=0]
* @returns {Promise<any>}
*
* @memberOf ReadyPrimes
*/
ReadyPrimes.primes = function (size, index) {
if (index === void 0) { index = 0; }
if (index < 0) {
index = 0;
}
if (index > MathHelper_1.MathHelper.REF.length.prime - size) {
index = MathHelper_1.MathHelper.REF.length.prime - size;
}
var chunks = MathHelper_1.MathHelper.getPrimeChunks(size + index);
return ReadyPrimes.getMultiple(JsonHelper_1.JsonHelper.readMultiplePrimeFiles, chunks, size, index);
};
/**
* Returns Promise, which when resolved, returns Array with given length (size) of 0's and 1's corresponding to whether index is a Prime or not.
* Example:
*
* * * * * * ... primes
* [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 ] ... Indexes
* [ 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1 ] ... result you will receive.
*
* Therefore, result Array[11] = 1 = true = prime
*
* @static
* @param {number} size
* @param {number} [index=0]
* @returns {Promise<any>}
*
* @memberOf ReadyPrimes
*/
ReadyPrimes.integers = function (size, index) {
if (index === void 0) { index = 0; }
if (index < 0) {
index = 0;
}
if (index > MathHelper_1.MathHelper.REF.length.integer - size) {
index = MathHelper_1.MathHelper.REF.length.integer - size;
}
var chunks = MathHelper_1.MathHelper.getIntegerChunks(size + index);
return ReadyPrimes.getMultiple(JsonHelper_1.JsonHelper.readMultipleIntegerFiles, chunks, size, index);
};
/**
* Returns Promise, which when resolved, returns true or false whether provided number is a Prime.
*
* @static
* @param {number} n
* @returns {Promise<any>}
*
* @memberOf ReadyPrimes
*/
ReadyPrimes.isPrime = function (n) {
var chunk = MathHelper_1.MathHelper.getIntegerChunk(n);
return new Promise(function (resolve, reject) {
JsonHelper_1.JsonHelper.readIntegerFile(chunk).then(function (data) {
resolve(data[n] === 1);
}).error(function (err) {
reject(false);
});
});
};
return ReadyPrimes;
}());
exports.ReadyPrimes = ReadyPrimes;