already exist, frankly there is so much wrong it's difficult to point all of them

great one, loved it :) // strong dose of nostalgia, Once upon a time... Then computers become smaller then men. You can choose any operation system under one tiny condition it will be disc operation system.

Value is not what was expected

it would be nice to look at what was expected, description too vage about that too, and no local test cases.

I up-voted you, but random tests are defаnetly needed

too raw

It would be nice to have more when one test

description ravished my brain

it will be much cleare if you just sad that output array must contain names of houses and "Gryffindor" should be on the same index as "Harry Potter" in the input array ets.

any clue, what kinde of tranch tool I should use ?

Description cryptic at best. It would be nice if you explicetly show :

var usPrice = { diesel: 2.165, gas: 2.137 };
var euPrice = { diesel: 1.049, gas: 1.149 };
var eur2usd = 1.1305;

it's hard to decide what one should do without reading forum

Running commonGround("aa bb cc", "bb cc") ...
Expected: bb cc, instead got: bb cc

and what execly is wrong?

random tests needed

hardly, sorry

random tests needed

random tests needed

random tests needed