[Chasmo]

> Software engineers at Google are strongly encouraged to program in one of four officially-approved programming languages at Google: C++, Java, Python, or Go​.

I wonder which of these languages they use to develop the google front page or any other frontend when no Javascript is allowed...

[Itaxpica]

Those are the primary, general four languages, but other languages are used as necessary for specific domains (e.g. Javascript, Objective-C/Swift), they're just not guaranteed to get the same level of internal tooling and infrastructure support (though in practice they do).

[fergus_google]

That's actually an error in the paper -- JavaScript is now an officially approved programming language at Google.

[DocSavage]

Clearly there is some use of Dart and JavaScript (vanilla, Angular and Polymer). It would be interesting to hear percentages across Google development.

[mining]

http://www.gwtproject.org/

Slightly tongue in cheek (since Google obviously uses javascript), but Java :)

[user5994461]

The only 4 languages I known. Awesome!