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typescript complex example from twitter question
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//From: https://www.typescriptlang.org/play?#code/C4TwDgpgBAEhA28D2AeACgJyZDwCWEAzlBAB7AQB2AJsRhAIbVKXwhSHAZ6UDmA2gF0AfFAC8UAN4AoKFDBYc+IgC4ombBFwFC0gL5QAZFABKEAMZIM1dIq3LC-SgFcAtgCMtggDRQXHrWFpaQB6EKhgAAtofgA6eI0lHUEoHgAzLWI8YCgGYgYI5zB4CGk050pzfBYoc3oGCjhEVET7HRJyKlooeuZWdk5uPiFhAApo5rUm5BQ4hLttIhEASilZHohgZwxKKAnkfWC6xkaEZFGZOQVNRcI1fgBySgZXCAffB4ZeN59159e1ABGABMAGZvOsvhA1AAWACsADZ9MtpEA | |
type Hello<Properties extends readonly string[]> = { | |
properties: Properties | |
} & Record<Properties[number], number> | |
// the [...Properties] infers it as a tuple | |
function createHello<Properties extends readonly string[]>(hello: Hello<[...Properties]>) { | |
return hello | |
} | |
createHello({ | |
properties: ['name', 'age'], | |
name: 123, | |
age: 456 | |
}) |
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