/*
function getFirstCodeLine(lines) {
  function isCode(line) {
    line = stripComments(stripWhitespaceFromEnds(line));
    if (line.length === 0) {
      return false;
    }
    return true;
  };

  let isLineCode

  lines = lines.filter(isCode);
  if (lines.length > 0) {
    return lines[0];
  }
  return false;
}
*/

/**
 * @param {string} source;
 **/
 // * @returns {{number: number, source: string, type: 'code'|'comment'|'blank'}}
 // TODO: https://stackoverflow.com/questions/32295263/how-to-document-an-array-of-objects-in-jsdoc
function splitCodeFromComments(source) {
  let lines = source.split(/\n/); // returns an array of lines

  const isLineBlank = (l) => { return l.length === 0 ? true : false };
  const isLineComment = (l) => { return stripWhitespaceFromEnds(l).startsWith(';') };
  const getLineType = (l) => {
    console.log('get type for ', l);
    if (isLineBlank(l)) return 'blank';
    if (isLineComment(l)) return 'comment';
    return 'code';
  }

  return lines.map((line, index) => {
    return {
      number: index,
      source: line,
      type: getLineType(line)
    };
  });
}

console.log(splitCodeFromComments('foo \n\n; bar'));


const logArrayElements = (element, index /*, array */) => {
  console.log(`a[${index}] = ${element}`);
  return index;
};

// Notice that index 2 is skipped, since there is no item at
// that position in the array.
console.log([2, 5, , 9].map(logArrayElements));

const l = ['', '', '; foo', 'bar'];

// console.log(getFirstCodeLine(l));

function stripComments(line) {
  return line.replace(/;.+/,"");
}

function stripWhitespaceFromEnds(line) {
  line = line.replace(/^\s+/,"");
  line = line.replace(/\s+$/,"");
  return line;
}