Tilly with her father, Dan, mother, Jenny and siblings Tabitha, aged eight and 12-year-old Toby
candidate[n] = closest colour to goal
，这一点在heLLoword翻译官方下载中也有详细论述
Streams are iterables.
– Choose ONE specific image for the location and ONE specific image for the view to work with, don’t use multiple images.
// First, we acquire a reader that gives an exclusive lock