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

use function in coalesce factory

Browse Source
This commit is contained in:
xaveyaguarez
2017-12-17 14:09:04 -08:00
parent 021df91849
commit 245e7442d8
1 changed files with 6 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
snippets/coalesce-factory.md
View File

@ -1,9 +1,11 @@
### Coalesce factory ### Coalesce factory
Returns a function which provides a customized coalesce function Returns a customized coalesce function that returns the first argument
that returns true from the provided argument validation function.
```js ```js
const coalesceFactory = (excludes = [null, undefined]) => (...args) => args.find(_ => !excludes.includes(_)) const coalesceFactory = valid => (...args) => args.find(valid)
// const customCoalesce = coalesceFactory([null, undefined, "", NaN])
// customCoalesce(undefined, null, NaN, "", "Waldo") -> "Waldo" // const customCoalesce = coalesceFactory(_ => ![null, undefined, "", NaN].includes(_))
// customCoalesce(undefined, null, NaN, "", "Waldo") //-> "Waldo"
``` ```