[Feature Request] skip --noImplicitAny checks when using `_ `

[masters3d]

TypeScript Version: Version 2.3.0-dev.20170217

Code

// A *self-contained* demonstration of the problem follows...
// "noImplicitAny": true,
const myFunc = ( _   , index: number) => { //[ts] Parameter '_' implicitly has an 'any' type.
    return `${index}`;
 }

Expected behavior:

skip errors "noImplicitAny": when using _

Actual behavior:

[ts] Parameter '_' implicitly has an 'any' type.

[Strate]

I don't think that it should be ignored. You can use {} to ignore argument

[masters3d]

@Strate I meant to say to not give errors. Same behavior as
#9458

[blakeembrey]

I don't think I'd want to skip implicit any checks using the underscore. It's currently used for ignoring the unused parameter. Is this a bug report, regression or feature request?

[masters3d]

@blakeembrey Feature Request since I don't think this was working before.

I need the parameter there so I can pass it to .map() or similar.
It is weird that I need to specify _: any for something I already tagged to skip errors.

[Strate]

Underscore has no special meaning in pure javascript. It is valid identifier for variable. To skip unused argument you can write like this:

function myMap({}, index: number) {
  return `${index}`
}

[masters3d]

Thanks @Strate ! This was your first suggestion too :)