}The distinction matters: := creates, = updates. Using = on a name that doesn’t exist is a compile error. Using := on a name that already exists in the same scope creates a new shadowed binding (see below).
result.put("express", expressInfo);
，这一点在新收录的资料中也有详细论述
国外企业：消息称苹果上调首款折叠机备货量，较原定目标增加20%。新收录的资料对此有专业解读
Examples and how to run