40-strip-comments.js

/*
Complete the solution so that it strips all text that follows any of a set of
comment markers passed in.
Any whitespace at the end of the line should also be stripped out.

Example:

Given an input string of:

apples, pears # and bananas
grapes
bananas !apples
The output expected would be:

apples, pears
grapes
bananas
The code would be called like so:

var result = solution("apples, pears # and bananas\ngrapes\nbananas !apples", ["#", "!"])
// result should == "apples, pears\ngrapes\nbananas"
*/

export default (input, markers) => {
  const transform = (e, symbols) => {
    if (symbols.length === 0) {
      return e;
    }
    if (e.includes(symbols[0])) {
      return e.slice(0, e.indexOf(symbols[0]) - 1);
    }
    return transform(e, symbols.slice(1));
  };
  return input.split('\n').map(e => transform(e, markers)).join('\n');
};