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Python 3 - comparing enums against hex value


Python 3 - comparing enums against hex value

By : Stefano
Date : October 25 2020, 07:10 AM
I hope this helps you . as newbie to python and hex based enums, I'm trying to wrap my head around something. My scenario is that I have a device that is sending me flags and I'm trying to determine which flags are set. I'm using python 3.7. , If you're strictly working with Flag objects, something like this:
code :
def main():

    from enum import Flag

    class DeviceFlag(Flag):
        Running = 0x1
        Stopped = 0x2
        ExternalPower = 0x4

    input_status = DeviceFlag.Running | DeviceFlag.ExternalPower

    for flag in DeviceFlag:
        name = flag.name
        is_set = bool(flag & input_status)
        print(f"{name}: {is_set}")

    return 0

if __name__ == "__main__":
    from sys import exit
    exit(main())
Running: True
Stopped: False
ExternalPower: True
def main():

    from enum import IntFlag

    class DeviceFlag(IntFlag):
        Running = 0x1
        Stopped = 0x2
        ExternalPower = 0x4

    # input_status = 0x5
    input_status = 0b101

    for flag in DeviceFlag:
        name = flag.name
        is_set = bool(flag & input_status)
        print(f"{name}: {is_set}")

    return 0

if __name__ == "__main__":
    from sys import exit
    exit(main())


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Comparing ENUMs in Java 6

Comparing ENUMs in Java 6


By : Sylvie_2015
Date : March 29 2020, 07:55 AM
wish helps you There's a lot of problems with the code that you posted (it won't compile without fixing a lot of errors), but the easiest way is to make Traveler implement the Comparable interface, like so:
code :
  public int compareTo(Traveler other) {
       return this.getTicketType().compareTo(other.getTicketType());
  }
 Collections.max(travelers);
Why does comparing enums using == cause a PMD warning?

Why does comparing enums using == cause a PMD warning?


By : voi009
Date : March 29 2020, 07:55 AM
Does that help This is indeed accepted as bug:
http://sourceforge.net/p/pmd/bugs/1028/ http://sourceforge.net/p/pmd/bugs/909/
code :
 // skip, if it is an enum
 if (type0.getType() != null && type0.getType().equals(type1.getType()) && type0.getType().isEnum()) {
      return data;
 }
Comparing Two Enums for all possible cases

Comparing Two Enums for all possible cases


By : david74
Date : March 29 2020, 07:55 AM
hope this fix your issue Rock, Paper, Scissors is a parity game. It becomes a bit clearer if you make the game more complicated, like Rock, Paper, Scissors, Spock, Lizard. If the distance is even, then the lower value wins. If the distance is odd, then the higher values wins. Here's a simple way we could build that:
code :
enum Hand: Int {
    enum Result {
        case lose, tie, win
    }

    case rock, paper, scissors, spock, lizzard

    func result(against: Hand) -> Result {
        let distance = rawValue - against.rawValue

        if distance == 0 { return .tie }

        if distance % 2 == 0 {
            return (rawValue < against.rawValue) ? .win : .lose
        }

        return (rawValue > against.rawValue) ? .win : .lose
    }
}
Comparing ENUMS

Comparing ENUMS


By : Memphis
Date : March 29 2020, 07:55 AM
help you fix your problem There are a few things you could do, I'll give two options.
Option 1
code :
public enum Animal {
    CAT(0),
    COW(2),
    DOG(1),
    ELEPHANT(3);

    public static Comparator<Animal> getSizeComparator() {
        return Comparator.comparingInt(Animal::getSize);
    }

    private final int size;

    Animal(final int size) {
        this.size = size;
    }

    public int getSize() {
        return size;
    }

}
Comparing enums with arguments

Comparing enums with arguments


By : Sowmiya
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Main idea is about comparing related values and those raw values if needed. So, you == func can be like this:
code :
static func == (lhs: SlideTemplate, rhs: SlideTemplate) -> Bool {
    switch (lhs, rhs) {
    case let (.centered(lvalue), .centered(rvalue)):
        return lvalue == rvalue
    case let (.horizontalSplit(lleft, lright), .horizontalSplit(rleft, rright)):
        return lleft == rleft && lright == rright
    case (.empty, .empty):
        return true
    default:
        return false
    }
}
...
case (.centered, .centered):
    return true
...
static func ==(lhs: SlideContent, rhs: SlideContent) -> Bool {
    switch (lhs, rhs) {
    case let (.text(lcontent), .text(rcontent)):
        return lcontent == rcontent
    case let (.image(lcontent), .image(rcontent)):
        return lcontent == rcontent
    default:
        return false
    }
}
if slide.template == SlideTemplate.centered(content: SlideContent.text(content: "SomeContent")) {
    print("centered for SomeContent")
}
if case .centered = slide.template {
    print("centered")
}
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