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How to key ReadonlyArray type by 'id' key?
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| /* | |
| * | |
| * I want to key array by 'id' | |
| * | |
| * FROM: [{id: 'a', name: 'A'}, {id: 'b', name: 'B'}] | |
| * TO: { a: {id: 'a', name: 'A'}, b: {id: 'b', name: 'B'} } | |
| * | |
| */ | |
| const arr = [{id: 'a', name: 'A'}, {id: 'b', name: 'B'}] as const | |
| type Arr = typeof arr; | |
| type K = Extract<keyof Arr, number>; | |
| type KeyBy<Arr extends ReadonlyArray<{id: string, name: string}>> = { | |
| [K in Arr[number]['id']]: Extract<Arr[number], {id: K}> | |
| } | |
| type Res = KeyBy<Arr> | |
| const a: Res = { | |
| a: {id: 'a', name: 'A'}, | |
| b: {id: 'b', name: 'B'} | |
| } |
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