gistfile1.js

module.exports = (logSources, printer) => {

  const entries = []
  logSources.forEach(logSource => {
    console.log("new log source")
    let newEntry = logSource.pop()
    while (newEntry) {
      entries.push(newEntry)
      newEntry = logSource.pop()
    }
  });
  const sortedEntries = mergeSort(entries);

  sortedEntries.forEach(entry => {
    printer.print(entry)
  });

  printer.done();
}