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

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

CodePudding user response：

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")