Remove isArmstrongNumber

snippets_archive/isArmstrongNumber.md

@@ -1,20 +0,0 @@
----
-title: isArmstrongNumber
-tags: math,beginner
----
-
-Checks if the given number is an Armstrong number or not.
-
-Convert the given number into an array of digits. Use the exponent operator (`**`) to get the appropriate power for each digit and sum them up. If the sum is equal to the number itself, return `true` otherwise `false`.
-
-```js
-const isArmstrongNumber = digits =>
-  (arr => arr.reduce((a, d) => a + parseInt(d) ** arr.length, 0) == digits)(
-    (digits + '').split('')
-  );
-```
-
-```js
-isArmstrongNumber(1634); // true
-isArmstrongNumber(56); // false
-```

test/isArmstrongNumber.test.js

@@ -1,11 +0,0 @@
-const {isArmstrongNumber} = require('./_30s.js');
-
-test('isArmstrongNumber is a Function', () => {
-  expect(isArmstrongNumber).toBeInstanceOf(Function);
-});
-test('isArmstrongNumber returns true', () => {
-  expect(isArmstrongNumber(1634)).toBeTruthy();
-});
-test('isArmstrongNumber returns false', () => {
-  expect(isArmstrongNumber(56)).toBeFalsy();
-});