"Given an array of integers, your task is to find two same numbers and return one of them. For example, in the array ```` the answer is 2."

There is no example array given in the description?

You are absolutely right to mention this. Description updated:

Everyone except the twins are single-born (i.e., unique individuals).

fixed

Merged.

pending js fork adding random tests

js fork 🤖🤖🤖

• added random tests
• used mocha/chai assertions + lodash for randomness
• provided input on failure

Merged the fix for two last points. Random tests still to be added.

Approved

python new test framework is required. updated in this fork

• No random tests in PHP

• Actual and expected are swapped

• Parameter in initial solution setup is missing $

2 years later...

still no random tests :/

"already approved some time ago"

Done!

I've found two more:

• You task should be Your task
• langauge should be language