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Made select variadic

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Angelos Chalaris
2018-01-11 20:17:25 +02:00
parent 14cdc112aa
commit d039251a93
1 changed files with 6 additions and 5 deletions
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snippets/select.md
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@ -1,15 +1,16 @@
### select ### select
Retrieve a property indicated by the selector from an object. Retrieve a set of properties indicated by the given selectors from an object.
If the property does not exists returns `undefined`. Use `Array.map()` for each selector, `String.split('.')` to split each selector and `Array.reduce()` to get the value indicated by it.
```js ```js
const select = (from, selector) => const select = (from, ...selectors) =>
selector.split('.').reduce((prev, cur) => prev && prev[cur], from); [...selectors].map(s => s.split('.').reduce((prev, cur) => prev && prev[cur], from));
``` ```
```js ```js
const obj = { selector: { to: { val: 'val to select' } } }; const obj = { selector: { to: { val: 'val to select' } } };
select(obj, 'selector.to.val'); // 'val to select' select(obj, 'selector.to.val'); // ['val to select']
select(obj, 'selector.to.val', 'selector.to'); // ['val to select', { val: 'val to select' }]
``` ```