functionHashtags.js

const formatHashTags = values => {
  const transformStringAndArray = values.split(' ');
  const deleteBlank = transformStringAndArray.filter(value => {
    return value !== '';
  });
  return deleteBlank.map(value => {
    if (value.charAt(0) !== '#') {
      const transformValueAndArray = value.split('');
      transformValueAndArray.unshift('#');
      return transformValueAndArray.join('');
    }
    return value;
  });
};