to return memory. When we have memory usage like this, we can do better
candidate[n] = closest colour to goal
，详情可参考爱思助手下载最新版本
Apple Watch 走的也是这条路——将健康与通知两个功能一边升级、一边剥离出来，用户需要购买额外的配件，才能解锁 iPhone 更全面的体验。，推荐阅读Line官方版本下载获取更多信息
NSMutableData *data = [NSMutableData dataWithLength:arr.size];
Stateful transforms are simple objects with member functions that maintain state across calls: