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Most TypeScript developers use TypeScript at a rudimentary level.

Don’t believe it? Try the daily challenge!

Today’s topic

// I have a bunch of required fields
interface DocType {
    aaa: string.bbb: string.ccc: string
}

// Function type definition, waiting for you to rewrite...
function makeDoc(part1: any, part2: any) {
    // ...
}
Copy the code

There is an interface called DocType that contains a set of required fields

We need to implement a function definition called makeDoc that takes part1 and part2, both of which have Partial

fields.

You need to implement type validation for two makeDoc parameters in TypeScript type definitions:

  1. part1 和 part2After the fields are merged, i.eObject.assign({}, part1, part2)To meet theDocTypeType definition of.
  2. part1 和 part2Cannot have duplicate fields in.

The test case

/ / legal
makeDoc({
    aaa: '111'.bbb: '222'
}, {
    ccc: '333'
})

/ / legal
makeDoc({
    aaa: '111'.bbb: '222'.ccc: '333'
}, {})

/ / legal
makeDoc({ccc: '333'}, {
    aaa: '111'.bbb: '222'
})

// An error should be reported (because required field CCC is missing)
makeDoc({
    aaa: '111'}, {bbb: '222'
})

// An error should be reported (because the aaa field repeats)
makeDoc({
    aaa: '111'.bbb: '222'
}, {
    aaa: '333'.ccc: '444',})Copy the code

Feel free to leave your answers or thoughts in the comments section

Find out at 17:00 PM on Friday.