medium iter-prac file-array.js

const fs = require('fs');
const virusChecker = require('virus-checker') // some non-existing pseudo library

const getFilesForProcessing = function* () {
  const dir = 'path/to/directory/';
  const fileNames = fs.readdirSync(dir); 
  
  for(const fileName of fileNames){
    yield fs.readdirSync(dir + fileName);
  }
}

virusChecker.check(getFilesForProcessing());