You have to do two steps. Finding an integral type large enough to store the values. You could use unsigned long, but the values could be negative. Then you could use long but the values could extend into the range of unsigned long. So there is not really a fit-it-all type. There is a trick … Read more
From the Swift Language Guide (Naming Constants & Variables section) If you need to give a constant or variable the same name as a reserved Swift keyword, surround the keyword with back ticks (`) when using it as a name. However, avoid using keywords as names unless you have absolutely no choice. enum MyEnum { … Read more
Java enum values are permitted to have value-specific class bodies, e.g. (and I hope this syntax is correct…) public enum MyEnum { A { void doSomething() { … } }, B { void doSomethingElse() { … } }; } This will generate inner classes representing the class bodies for A and B. These inner classes … Read more
From the class file format spec: The per-class or per-interface constant pool is limited to 65535 entries by the 16-bit constant_pool_count field of the ClassFile structure (ยง4.1). This acts as an internal limit on the total complexity of a single class or interface. I believe that this implies that you cannot have more then 65535 … Read more
Create new folder Views/Shared/DisplayTemplates Add empty Partial View named Enum, to the folder Replace Enum View code with: @model Enum @if (EnumHelper.IsValidForEnumHelper(ViewData.ModelMetadata)) { // Display Enum using same names (from [Display] attributes) as in editors string displayName = null; foreach (SelectListItem item in EnumHelper.GetSelectList(ViewData.ModelMetadata, (Enum)Model)) { if (item.Selected) { displayName = item.Text ?? item.Value; } … Read more
Anything but return this == other would be counter intuitive and violate the principle of least astonishment. Two enum constants are expected to be equal if and only if they are the same object and the ability to override this behavior would be error prone. Same reasoning applies to hashCode(), clone(), compareTo(Object), name(), ordinal(), and … Read more
As IntelliJ IDEA suggest when extracting constant – make static nested class. This approach works: @RequiredArgsConstructor public enum MyEnum { BAR1(Constants.BAR_VALUE), FOO(“Foo”), BAR2(Constants.BAR_VALUE), …, BARn(Constants.BAR_VALUE); @Getter private final String value; private static class Constants { public static final String BAR_VALUE = “BAR”; } }
You should just be able to use the overloads of Enums ToString method to give it a format string, this will print out the value of the enum as a string. public static class Program { static void Main(string[] args) { var val = Urgency.High; Console.WriteLine(val.ToString(“D”)); } } public enum Urgency { VeryHigh = 1, … Read more
The part you’re missing is converting from the integer to the type-safe enum. Java will not do it automatically. There’s a couple of ways you can go about this: Use a list of static final ints rather than a type-safe enum and switch on the int value you receive (this is the pre-Java 5 approach) … Read more
I think no one actually has answered to the first question: Why did they create those variables? Those variables aren’t strictly necessary. It’s true. You can perfectly do something like this: MONTH_CHOICES = ( (“JANUARY”, “January”), (“FEBRUARY”, “February”), (“MARCH”, “March”), # …. (“DECEMBER”, “December”), ) month = models.CharField(max_length=9, choices=MONTH_CHOICES, default=”JANUARY”) Why using variables is better? … Read more