Can you give a simple example? On Wed, 21 Mar 2018 at 00:44 dante federici <[email protected]> wrote:
> With the advent of TypeScript, classes, etc one feature I liked from scala > is: `???`, the [Predef.???]( > https://www.scala-lang.org/api/current/scala/NotImplementedError.html) > token. > > Basically, you can place `???` which would type as whatever the method is > typed as (for things like Typescript, Symbol definitions, etc.), and when > run, throws the "NotImplementedError". > > This is useful when writing libraries or other code -- more readable that > "cannot call undefined" when the method is missing, and a nice placeholder > for young APIs. > > This is basically the same as writing: `throw new Error('Unimplemented')`. > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss >
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