Custom groupBy return type incorrect

[ProfessorX737]

The custom groupBy return type should be Partial<Record<T[Key], T[]>>

[JRMurr]

@ProfessorX737 ahh yea are you talking about the case for something like

const foo: Array<{type: 'a'} | {type: 'b'}> = [{type: 'a'}];

const grouped = groupBy(foo, 'type')

grouped.b //sad

I have actually ran into this after making that post and was able to work around it with https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy returning an empty array for all missing keys but it feels wrong

Ill update the post