Add Tuple.mapBoth function

[minond]

Helper function when you need to apply a function to both elements in a Tuple. Like a combination of mapFirst and mapSecond:

mapBoth ((+) 1) (6, 8) == (7, 9)

[process-bot]

Thanks for the pull request! Make sure it satisfies this checklist. My human colleagues will appreciate it!

Here is what to expect next, and if anyone wants to comment, keep these things in mind.

[process-bot]

Thanks for the pull request! Make sure it satisfies this checklist. My human colleagues will appreciate it!

Here is what to expect next, and if anyone wants to comment, keep these things in mind.

[minond]

Ummm... I think I'm missing something. Build is failing with an elm-make: elm-package.json: openBinaryFile: does not exist (No such file or directory) error, which I'm getting locally as well. I'm looking around for some technical documentation on contributing to core but haven't been able to find it or anything that is helpful with dealing with this error. Could someone point me in the right direction?

[minond]

Ummm... I think I'm missing something. Build is failing with an elm-make: elm-package.json: openBinaryFile: does not exist (No such file or directory) error, which I'm getting locally as well. I'm looking around for some technical documentation on contributing to core but haven't been able to find it or anything that is helpful with dealing with this error. Could someone point me in the right direction?

[jvoigtlaender]

Maybe the most important information to you, wanting to contribute to core, is this document: https://github.com/elm-lang/core/blob/master/.github/CONTRIBUTING.md

Note in particular what it says in the "Adding New Functions" section.

[jvoigtlaender]

Maybe the most important information to you, wanting to contribute to core, is this document: https://github.com/elm-lang/core/blob/master/.github/CONTRIBUTING.md

Note in particular what it says in the "Adding New Functions" section.

[minond]

@jvoigtlaender thanks for sending me that. What's documented there totally makes sense. If this seems like it belongs in an *-extra package instead, then I can move it.

[minond]

@jvoigtlaender thanks for sending me that. What's documented there totally makes sense. If this seems like it belongs in an *-extra package instead, then I can move it.

[jvoigtlaender]

Contributing it to https://github.com/elm-community/basics-extra would make sense. That package already has a section of tuple functions (http://package.elm-lang.org/packages/elm-community/basics-extra/2.1.2/Basics-Extra#=%3E).

[jvoigtlaender]

Contributing it to https://github.com/elm-community/basics-extra would make sense. That package already has a section of tuple functions (http://package.elm-lang.org/packages/elm-community/basics-extra/2.1.2/Basics-Extra#=%3E).

[evancz]

This is already in the dev branch I believe!

[evancz]

This is already in the dev branch I believe!