Rosetta Code Challenges - Align columns

Rosetta Code
1

Tell us what’s happening:

My output appears to be correct, yet my code doesn’t pass test 2, 3, or 4. I’ve looked at other questions, but with no known correct output, I can’t check my output against it.

Your code so far

function formatText(input, justification) {
  let length = [];
  let result = input.map((line) => {
    line = line.split('$').filter((str, idx) => {
      if(idx > length.length - 1) {
        length.push(0);
      }
      length[idx] = Math.max(str.length, length[idx]);
      if(str !== '') {
        return str;
      }
    });
    return line;
  }).map((arr) => {
    arr = arr.map((str, idx) => {
      if(str.length === length[idx]) {
        return str;
      } else {
        if(justification === "left") {
          return str + " ".repeat(length[idx] - str.length);
        } else if(justification === "right") {
          return " ".repeat(length[idx] - str.length) + str;
        } else if(justification === "center") {
          return " ".repeat(Math.floor((length[idx] - str.length)/2)) + str + " ".repeat(Math.ceil((length[idx] - str.length)/2));
        }
      }
    });
    return arr;
  });
  result = result.reduce((outer, array) => {
    outer += array.reduce((inner, curr) => {
      inner += curr + ' ';
      return inner;
    }, '');
    return outer + '\n';
  }, '')
  return result;
}

const testText = [
  'Given$a$text$file$of$many$lines',
  'where$fields$within$a$line$',
  'are$delineated$by$a$single$"dollar"$character',
  'write$a$program',
  'that$aligns$each$column$of$fields$',
  'by$ensuring$that$words$in$each$',
  'column$are$separated$by$at$least$one$space.',
  'Further,$allow$for$each$word$in$a$column$to$be$either$left$',
  'justified,$right$justified',
  'or$center$justified$within$its$column.'
];

console.log(formatText(testText, 'left'));

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Challenge Information:

Rosetta Code Challenges - Align columns

2

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