function flatten()

in gulpfile.babel.js [222:226]

• 5 lines of code
• 2 McCabe index (conditional complexity)

function flatten(arr) {
  return arr.reduce(function (flat, toFlatten) {
    return flat.concat(Array.isArray(toFlatten) ? flatten(toFlatten) : toFlatten);
  }, []);
}