Not expected .map()/.match(regex) output

First line of the input contains an integer, N. Then N lines follow.
From the second line onwards, each line contains a set of W words separated by a single space.
For every line,
Print (console.log()) 1 if the conversation starts with hackerrank
Print 2 if the conversation ends with hackerrank
Print 0 if the conversation starts and ends with hackerrank
Print -1 if none of the above.

Code (JavaScript)

const processData = (input) =>
  input
    .split("\n")
    .slice(1)
    .map((line) => line.match(/^(hackerrank)\b.*(?<!\bhackerrank)$/g) ? console.log(1) : line.match(/ hackerrank$/g) ? console.log(2) : line.match(/^(hackerrank)\b(.*(?<!\bhackerrank))?$/g) ? console.log(0) : console.log(-1));

Input

4
i love hackerrank
hackerrank is an awesome place for programmers
hackerrank
i think hackerrank is a great place to hangout

Expected output

2 1 0 -1
(one number by line… im having a hard time with my markdown)

The output I get

2 1 0 -1 -1
(one number by line… im having a hard time with my md)

what’s going on with this last -1?
i’ve tested this code on codepen and it works but it doesn’t work on hackerrank

thank you

>Solution :

You can remove empty lines before parsing with filter.

input.split("\n").slice(1).filter(Boolean)

Alternatively, remove leading and trailing whitespace from the input with String#trim before splitting.

input.trim().split("\n")