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

Travis build: 110

Browse Source
This commit is contained in:
30secondsofcode
2018-07-18 18:03:57 +00:00
parent 96c0254536
commit 21d06a55fa
15 changed files with 194 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
snippets/uniqueElementsByRight.md
View File

@ -7,21 +7,21 @@ The comparator function takes two arguments: the values of the two elements bein
```js
const uniqueElementsByRight = (arr, fn) =>
arr.reduceRight((acc, v) => {
if (!acc.some(x => fn(v, x))) acc.push(v);
return acc;
}, []);
arr.reduceRight((acc, v) => {
if (!acc.some(x => fn(v, x))) acc.push(v);
return acc;
}, []);
```
```js
uniqueElementsByRight(
[
{ id: 0, value: 'a' },
{ id: 1, value: 'b' },
{ id: 2, value: 'c' },
{ id: 1, value: 'd' },
{ id: 0, value: 'e' },
],
(a, b) => a.id == b.id
[
{ id: 0, value: 'a' },
{ id: 1, value: 'b' },
{ id: 2, value: 'c' },
{ id: 1, value: 'd' },
{ id: 0, value: 'e' }
],
(a, b) => a.id == b.id
); // [ { id: 0, value: 'e' }, { id: 1, value: 'd' }, { id: 2, value: 'c' } ]
```