官方文档说明,安卓开发应避免使用Enum(枚举类),因为相比于静态常量Enum会花费两倍以上的内存.参 http://developer.android.com/training/articles/memory.html#Overhead 那么如果需要使用Enum应该怎么做呢? https://noobcoderblog.wordpress.com/2015/04/12/java-enum-and-android-intdefstringdef-annotation/ public class
print 函数的打印格式: ##no quote print out > x <- letters[1:5] > print(x,quote=F,);print(x,quote=T) [1] a b c d e [1] "a" "b" "c" "d" "e" ##print without number of vector and quote > cat(x) a b c d e