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Check for array length in tail function to return the correct value for single-value arrays.

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Hendra Susanto
2017-12-13 16:37:41 +07:00
parent 0a114151c0
commit f53f1e4a52
2 changed files with 4 additions and 2 deletions
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README.md
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@ -503,8 +503,9 @@ Use array destructuring to swap values between two variables.
Return `arr.slice(1)`. Return `arr.slice(1)`.
```js ```js
const tail = arr => arr.slice(1); const tail = arr => arr.length > 1 ? arr.slice(1) : arr;
// tail([1,2,3]) -> [2,3] // tail([1,2,3]) -> [2,3]
// tail([1]) -> [1]
``` ```
### Unique values of array ### Unique values of array

3
snippets/tail-of-list.md
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@ -3,6 +3,7 @@
Return `arr.slice(1)`. Return `arr.slice(1)`.
```js ```js
const tail = arr => arr.slice(1); const tail = arr => arr.length > 1 ? arr.slice(1) : arr;
// tail([1,2,3]) -> [2,3] // tail([1,2,3]) -> [2,3]
// tail([1]) -> [1]
``` ```