Strip Comments

题目

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: 

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

分析

注意题目里的\n是换行符的意思！

答案

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function solution(input, markers) {
    var input_arr = input.split("\n");
    for (var i in markers) {
        for (var j in input_arr) {
            if (input_arr[j].indexOf(markers[i]) > -1) {
                input_arr[j] = input_arr[j].substring(0, input_arr[j].indexOf(markers[i])).trim();
            }
        }
    }
    return input_arr.join("\n");
};