Prickles in a Pickle
Легендарный музыкант рассказал об отношении КГБ к рокерам17:53
，这一点在新收录的资料中也有详细论述
Here’s another cool bit: you can index into an array using an array of booleans. This is a filter operation. It picks the element indexes corresponding to true and discards those that correspond to false.
total = total + values[i];