Java1.5 provides a keyword enum that makes it easy to define the type of enumeration you need, for example
enum Season {
SPRING, SUMMER, AUTUMN, WINTER
}
A seasonal enumeration type is defined.In this case, for season.spring
Java1.5 provides a keyword enum that makes it easy to define the type of enumeration you need, for example
enum Season {
SPRING, SUMMER, AUTUMN, WINTER
}
A seasonal enumeration type is defined.In this case, for season.spring
Java1.5 provides a keyword enum that makes it easy to define the type of enumeration you need, for exampleenum Season {SPRING, SUMMER, AUTUMN, WINTER}a seasonal enumeration type is defined. in this case, for season.spring this object,
Java1.5 provides a keyword enum that makes it easy to define the type of enumeration you need, for example
enum Season {
SPRING, SUMMER, AUTUMN, WINTER
}
A seasonal enumeration type is defined.In this case, for season.spring
Java1.5 provides a keyword enum that makes it easy to define the type of enumeration you need, for example
enum Season {
SPRING, SUMMER, AUTUMN, WINTER
}
A seasonal enumeration type is defined.In this case, for season.spring
Enumeration type in C ++C ++ 11 provides a safer Enumeration type and cannot be used directly as an integer. But what if we want to use it as an integer?For exampleEnum class ElemType{CAP,IND,VS};
In the past, when we used the enumeration type, we
/ * About enumeration types
1. The keywords we have now learned about custom data types are Class (Class), Interface (interface), enum (enum)
2. The values () method in the enumeration type is used to enumerate the various types in the enumeration
3.
Terminating app due to uncaught exception ' nsgenericexception ', Reason: ' * * * Collection was mutated while being enumerated. 'It is not literally difficult to understand that the reason for crash is that we iterate over the array while
Original URL: http://www.jianshu.com/p/ad80d9443a92Support original, if need to reprint, please indicate the sourceDo you think you really know for...in ... ??haha haha, I also encountered this error.The reason, as the name implies, "has changed at
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