4kyu_StripComments.js

// 4kyu - Strip Comments

// Description:
// 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"

function solution(str, arr) {
    str = str.split("\n")
    for(let i = 0; i < str.length; i++){
        let shorter;
        for(let j = 0; j < arr.length; j++) {
            let idx = str[i].indexOf(arr[j]);
            if(idx > -1)
                shorter = (idx<shorter||!shorter) ? idx : shorter;
        }
        if(shorter)
            str[i] = str[i].substr(0, shorter).trim();
    }
    return str.join("\n");
}