andre/30-seconds-of-code
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Apply new format to snippets and template

Browse Source
This commit is contained in:
Angelos Chalaris
2020-09-15 16:28:04 +03:00
parent 040efd4380
commit 53c16dbf65
401 changed files with 969 additions and 950 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
snippets/invertKeyValues.md
View File

@ -5,8 +5,8 @@ tags: object,function,intermediate
Inverts the key-value pairs of an object, without mutating it. The corresponding inverted value of each inverted key is an array of keys responsible for generating the inverted value. If a function is supplied, it is applied to each inverted key.
Use `Object.keys()` and `Array.prototype.reduce()` to invert the key-value pairs of an object and apply the function provided (if any).
Omit the second argument, `fn`, to get the inverted keys without applying a function to them.
- Use `Object.keys()` and `Array.prototype.reduce()` to invert the key-value pairs of an object and apply the function provided (if any).
- Omit the second argument, `fn`, to get the inverted keys without applying a function to them.
```js
const invertKeyValues = (obj, fn) =>
@ -21,4 +21,4 @@ const invertKeyValues = (obj, fn) =>
```js
invertKeyValues({ a: 1, b: 2, c: 1 }); // { 1: [ 'a', 'c' ], 2: [ 'b' ] }
invertKeyValues({ a: 1, b: 2, c: 1 }, value => 'group' + value); // { group1: [ 'a', 'c' ], group2: [ 'b' ] }
```
```