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Update isArmstrongNumber.md

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Angelos Chalaris
2017-12-20 11:10:54 +02:00
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snippets/isArmstrongNumber.md
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@ -5,8 +5,8 @@ Checks if the given number is an armstrong number or not.
Convert the given number into array of digits. Use `Math.pow()` 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`. Convert the given number into array of digits. Use `Math.pow()` 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 ```js
const isArmstrongNumber = digits => ( arr => arr.reduce( ( a, d ) => a + Math.pow( parseInt( d ), arr.length ), 0 ) == digits ? true : false )( ( digits+'' ).split( '' ) ) const isArmstrongNumber = digits =>
( arr => arr.reduce( ( a, d ) => a + Math.pow( parseInt( d ), arr.length ), 0 ) == digits ? true : false )( ( digits+'' ).split( '' ) );
// isArmstrongNumber(1634) -> true // isArmstrongNumber(1634) -> true
// isArmstrongNumber(371) -> true // isArmstrongNumber(371) -> true
// isArmstrongNumber(56) -> false // isArmstrongNumber(56) -> false