136 lines
3.3 KiB
JavaScript
136 lines
3.3 KiB
JavaScript
/**
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* (C) Copyright Collin J. Doering 2017
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* File: fizzbuzz.js
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* Author: Collin J. Doering <collin@focus21.io>
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* Date: Jan 15, 2017
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*/
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// Naive implementation
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function fizzbuzz_naive(a, b) {
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if (a > b) {
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throw "Invalid interval error!"
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}
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for (let i = a; i <= b; ++i) {
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let divBy3 = i % 3 === 0;
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let divBy5 = i % 5 === 0;
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if (divBy3 && divBy5) {
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console.log('FizzBuzz');
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} else if (divBy3) {
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console.log('Fizz');
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} else if (divBy5) {
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console.log('Buzz');
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} else {
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console.log(i);
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}
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}
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}
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//fizzbuzz_naive(0, 100);
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// Generates a array of integers from a to b
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function rangeArr(a, b) {
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if (a > b) {
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throw 'Invalid range error!';
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}
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let ret = [];
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for (let i = a; i <= b; ret.push(i++));
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return ret;
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}
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function printArr(arr) {
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arr.forEach((a) => console.log(a));
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}
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function fizzbuzz_functional(x, y) {
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const fuzzbuzz_f = (a, b) => rangeArr(a, b).map((i) => {
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let divBy3 = i % 3 === 0;
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let divBy5 = i % 5 === 0;
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if (divBy3 && divBy5) {
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return 'FizzBuzz';
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} else if (divBy3) {
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return 'Fizz';
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} else if (divBy5) {
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return 'Buzz';
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} else {
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return i;
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}
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});
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printArr(fuzzbuzz_f(x, y));
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}
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//fizzbuzz_functional(0, 100);
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// Abstracted fizzbuzz
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function fizzbuzz_functional_abstracted(a, b, ...xs) {
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return rangeArr(a, b).map((i) => {
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return xs.reduce((acc, x) => {
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let ret = acc;
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if (i % x.num === 0) {
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ret = typeof ret === 'number' ? x.name : ret.concat(x.name);
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}
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return ret;
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}, i);
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});
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}
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printArr(fizzbuzz_functional_abstracted(0, 100, { name: 'Fizz', num: 3 }, { name: 'Buzz', num: 5 }, { name: 'Bam', num: 8 }));
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// Abstracted and using generators
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function take(gen) {
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return (n) => {
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let ret = [];
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for (let i = 0; i < n; ++i)
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ret.push(gen.next().value);
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return ret;
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};
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}
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function* range(a, b) {
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if (a > b) {
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throw 'Invalid range error!';
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}
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for (let i = a; i <= b; yield i++);
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}
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function* fizzbuzz(a, b, ...xs) {
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let r = range(a, b);
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for (i of r) {
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yield xs.reduce((acc, x) => {
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let ret = acc;
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if (i % x.num === 0) {
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ret = typeof ret === 'number' ? x.name : ret.concat(x.name);
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}
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return ret;
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}, i);
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}
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}
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let fbb = fizzbuzz(0, 100000000000, { name: 'Fizz', num: 3 }, { name: 'Buzz', num: 5 }, { name: 'Bam', num: 8 });
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printArr(take(fbb)(10));
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for (i of fbb) {
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console.log(i);
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}
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