preprocessors/index.js
function descriptions(filepath, info, callback) {
  applicable(filepath, info, (err, preprocessors) => {
    if (err) return callback(err);
    callback(null, preprocessors.map((preprocessor) => {
      return preprocessor.description;
    }));
  });
}
function descriptions(filepath, info, callback) {
  applicable(filepath, info, (err, preprocessors) => {
    if (err) return callback(err);
    callback(null, preprocessors.map((preprocessor) => {
      return preprocessor.description;
    }));
  });
}
function descriptions ( filepath , info , callback ) { applicable ( filepath , info , ( err , preprocessors ) => { if ( err ) return callback ( err ) ; callback ( null , preprocessors . map ( ( preprocessor ) => { return preprocessor . description ; } ) ) ; } ) ; }
Just maps applicable preprocessors into a list of descriptions
Just maps applicable preprocessors into a list of descriptions