8ee50178f3
Correct: `Array.from()` (it’s a static method) Incorrect: `Array.join()` (doesn’t exist; it’s a prototype method) This patch uses the common `#` syntax to denote `.prototype.`.
22 lines
789 B
Markdown
22 lines
789 B
Markdown
### get
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Retrieve a set of properties indicated by the given selectors from an object.
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Use `Array.prototype.map()` for each selector, `String.prototype.replace()` to replace square brackets with dots, `String.prototype.split('.')` to split each selector, `Array.prototype.filter()` to remove empty values and `Array.prototype.reduce()` to get the value indicated by it.
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```js
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const get = (from, ...selectors) =>
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[...selectors].map(s =>
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s
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.replace(/\[([^\[\]]*)\]/g, '.$1.')
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.split('.')
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.filter(t => t !== '')
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.reduce((prev, cur) => prev && prev[cur], from)
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);
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```
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```js
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const obj = { selector: { to: { val: 'val to select' } }, target: [1, 2, { a: 'test' }] };
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get(obj, 'selector.to.val', 'target[0]', 'target[2].a'); // ['val to select', 1, 'test']
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```
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