chkilel/Useful-snippets.js

## Useful-snippets.js
// Concat two arrays of objects and keep unique values
// Values from arr1 will be kept if exist in arr2, comparison made on `key`
// object {key: 1, label: '..', ....}

const unique = [...arr1, ...arr2].filter(
  (item, index, self) => self.findIndex((t) => t.key === item.key) === index
)
	// Concat two arrays of objects and keep unique values
	// Values from arr1 will be kept if exist in arr2, comparison made on `key`
	// object {key: 1, label: '..', ....}

	const unique = [...arr1, ...arr2].filter(
	(item, index, self) => self.findIndex((t) => t.key === item.key) === index
	)