Interesting how reverse_it(true) does not look for "false", but for "true".

Expect error: "Omae wa mo shindeiru". Look at the output more carefully.

Exploit!! ahahah

fails if seq.size > this example

It DOES NOT ask you to find odd numbers. It asks you to find odd occurrences of the digits. It does not mean the digits itself cannot be even. Read kata's descriptions carefully, lol.

Surprised that myjinxin2015 didn't make a test case for execution time like he usually does. Found one accepted Ruby solution that should fail for array with length 100_000+ .

can someone explain me how ?<=X works here?

Oh grandmaster of JS and / or Ruby, can you give a hint where to start from? I am kind of stuck :-(

Works fine for 2017.

Same problem, I used thingy called "deep copy". It copies from another copy or something like that. In Ruby the syntax is name1 = Marshal.load(Marshal.dump(name2)). Pretty sure there is something like that in JavaScript.

You should tell in the description that it contains a syntax error and it should be fixed.

Why do you need tests?
It asks you only for syntax.