code: function compact (arr) {
    var idx = -1
    var end = arr.length
    var out = []
  
    while (++idx < end) {
      if (arr[idx]) out.push(arr[idx])
    }
  
    return out
  }
docs: Drop empty values from array.
  
  @param  {Array} array
  Array of strings.
  
  @return {Array}
  Array of strings (empty values dropped).