~ is the unary one’s complement operator — it flips the bits of its operand. ~0 = 0xFFFFFFFF = -1 in two’s complement arithmetic, ~x == -x-1 the ~ operator can be found in pretty much any language that borrowed syntax from C, including Objective-C/C++/C#/Java/Javascript.
>>> Example(1).name ‘one’ also see the Python docs.
class Materials: Shaded, Shiny, Transparent, Matte = range(4) >>> print Materials.Matte 3
static IEnumerable<Enum> GetFlags(Enum input) { foreach (Enum value in Enum.GetValues(input.GetType())) if (input.HasFlag(value)) yield return value; }
TypeScript 0.9+ has a specification for enums: enum AnimationType { BOUNCE, DROP, } The final comma is optional.
The scope of the template is limited to the component instance members. If you want to refer to something it needs to be available there class MyComponent { public get connectionResult(): typeof ConnectionResult { return ConnectionResult; } } In the HTML you can now use *ngIf=”connectionResult.Success” See also Angular2 access global variables from HTML template
Taken from the current C Standard (C99): http://www.open-std.org/JTC1/SC22/WG14/www/docs/n1256.pdf 6.7.2.2 Enumeration specifiers […] Constraints The expression that defines the value of an enumeration constant shall be an integer constant expression that has a value representable as an int. […] Each enumerated type shall be compatible with char, a signed integer type, or an unsigned integer type. … Read more
Actually, it is possible, with an ugly trick. However, it cannot be used for extension methods. public abstract class Enums<Temp> where Temp : class { public static TEnum Parse<TEnum>(string name) where TEnum : struct, Temp { return (TEnum)Enum.Parse(typeof(TEnum), name); } } public abstract class Enums : Enums<Enum> { } Enums.Parse<DateTimeKind>(“Local”) If you want to, you … Read more
I know this is old but I feel this will help people. I just went through this exact problem and discovered if you’re using string enums, declaring your enums as a subclass of str works well for almost all situations: import json from enum import Enum class LogLevel(str, Enum): DEBUG = ‘DEBUG’ INFO = ‘INFO’ … Read more
In .NET 4 there is a new method Enum.HasFlag. This allows you to write: if ( testItem.HasFlag( FlagTest.Flag1 ) ) { // Do Stuff } which is much more readable, IMO. The .NET source indicates that this performs the same logic as the accepted answer: public Boolean HasFlag(Enum flag) { if (!this.GetType().IsEquivalentTo(flag.GetType())) { throw new … Read more