I have a js function that outputs an array with 3 numbers. Could I define a type/interface/whatever that will treat the array as an object.
So that Somethig.GetVector().X transpiles into Something.GetVector()[0]
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1 Answer
No, TypeScript transpilation doesn't work that way.
You can define a TypeScript interface that extends an array:
interface ExtArr extends Array<string> {
extProp?: string
}
const a: ExtArr = ['foo', 'bar', 'baz']
a.extProp = 'quux'
However, the type information transpiles away to nothing - it's only used by TypeScript, not JavaScript.
Alternatively, you can define a function that converts the array into an object with friendly property names. It sounds like this is probably what you want for your use case:
const makeFriendly = (unfriendlyArray: string[] /* or whatever type */) => {
const [ propName1, propName2, propName3 ] = unfriendlyArray
return { propName1, propName2, propName3 }
}
makeFriendly(['foo', 'bar', 'baz']) // { propName1: "foo", propName2: "bar", propName3: "baz" }
