From b14b1269882495d33c8f2293be13e5571af3131a Mon Sep 17 00:00:00 2001 From: Akshay Dubey Date: Fri, 25 Nov 2022 10:55:43 +0530 Subject: [PATCH 1/3] feat: Add hexagonal number --- Maths/HexagonalNumber.js | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 Maths/HexagonalNumber.js diff --git a/Maths/HexagonalNumber.js b/Maths/HexagonalNumber.js new file mode 100644 index 0000000000..277d3e35e2 --- /dev/null +++ b/Maths/HexagonalNumber.js @@ -0,0 +1,21 @@ +/* + * Author: Akshay Dubey (https://github.com/itsAkshayDubey) + * Hexagonal Number: https://en.wikipedia.org/wiki/Hexagonal_number + * The nth hexagonal number hn is the number of distinct dots in a pattern of dots + * consisting of the outlines of regular hexagons with sides up to n dots, when the + * hexagons are overlaid so that they share one vertex. + */ + +/** + * @function hexagonalNumber + * @description -> returns nth hexagonal number + * @param {Integer} number + * @returns {Integer} nth hexagonal number + */ + +export const hexagonalNumber = (number) => { + if (number <= 0) { + throw new Error('Number must be greater than zero.') + } + return number * (2 * number - 1) +} From d006028856045bd46dc2f9afa47ad9b1139d270a Mon Sep 17 00:00:00 2001 From: Akshay Dubey Date: Fri, 25 Nov 2022 10:55:59 +0530 Subject: [PATCH 2/3] test: Add unit tests for hexagonal number --- Maths/test/HexagonalNumber.test.js | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 Maths/test/HexagonalNumber.test.js diff --git a/Maths/test/HexagonalNumber.test.js b/Maths/test/HexagonalNumber.test.js new file mode 100644 index 0000000000..ebfc1cc738 --- /dev/null +++ b/Maths/test/HexagonalNumber.test.js @@ -0,0 +1,19 @@ +import { hexagonalNumber } from '../HexagonalNumber' + +const expectedValuesArray = [1, 6, 15, 28, 45, 66, 91, 120, 153, 190, 231, 276, 325, 378, 435, 496, 561, 630, 703, 780, 861, 946] + +describe('Testing hexagonalNumber', () => { + for (let i = 1; i <= 22; i++) { + it('Testing for number = ' + i + ', should return ' + expectedValuesArray[i], () => { + expect(hexagonalNumber(i)).toBe(expectedValuesArray[i - 1]) + }) + } + + it('should throw error when supplied negative numbers', () => { + expect(() => { hexagonalNumber(-1) }).toThrow(Error) + }) + + it('should throw error when supplied zero', () => { + expect(() => { hexagonalNumber(0) }).toThrow(Error) + }) +}) From 3b7b1f18907f2010a7267cfd99d0de50ec385a68 Mon Sep 17 00:00:00 2001 From: Akshay Dubey Date: Fri, 25 Nov 2022 10:58:55 +0530 Subject: [PATCH 3/3] refactor: Fix build failure --- Maths/HexagonalNumber.js | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Maths/HexagonalNumber.js b/Maths/HexagonalNumber.js index 277d3e35e2..31fac7ea75 100644 --- a/Maths/HexagonalNumber.js +++ b/Maths/HexagonalNumber.js @@ -2,7 +2,7 @@ * Author: Akshay Dubey (https://github.com/itsAkshayDubey) * Hexagonal Number: https://en.wikipedia.org/wiki/Hexagonal_number * The nth hexagonal number hn is the number of distinct dots in a pattern of dots - * consisting of the outlines of regular hexagons with sides up to n dots, when the + * consisting of the outlines of regular hexagons with sides up to n dots, when the * hexagons are overlaid so that they share one vertex. */