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Defined operator works in main() but doesn't work in class


Defined operator works in main() but doesn't work in class

By : nitrazepam
Date : November 22 2020, 10:40 AM
it helps some times It does not work in Plane since the Punkt objects are const and the operator- function is a non-const member function.
You should make operator- a const member function.
code :
vector<double>& operator - (const Punkt B) const;
                                          //^^^^
vector<double> global;
vector<double> operator - (const Punkt B) const
{
    vector<double> res;
    res.push_back(B.x - x);
    res.push_back(B.y - y);
    res.push_back(B.z - z);
    return res;
}


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Camel Exception handling doesnt work if exception clause is defined in a separate class

Camel Exception handling doesnt work if exception clause is defined in a separate class


By : Nero
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , correct, the onException() clauses only apply to the current RouteBuilder's route definitions...
that said, you can reuse these definitions by having all your RouteBuilders extend the ExceptionRouteBuilder and call super.configure()...something like this
code :
public class MyRouteBuilder extends ExceptionRouteBuilder {
    @Override
    public void configure() throws Exception {
        super.configure();
        from("direct:start").throwException(new Exception("error"));
    }
}
...
public class ExceptionRouteBuilder implements RouteBuilder {
    @Override
    public void configure() throws Exception {
        onException(Exception.class).handled(true).to("mock:error");
    }
}
public class MyRouteBuilder extends RouteBuilder {
    @Override
    public void configure() throws Exception {
        ExceptionBuilder.setup(this);
        from("direct:start").throwException(new Exception("error"));
    }
}
...
public class ExceptionBuilder {
    public static void setup(RouteBuilder routeBuilder) {
        routeBuilder.onException(Exception.class).handled(true).to("mock:error");
    }  
}
PHP - class property with ternary operator confsuion - could someone explain why this doesnt work

PHP - class property with ternary operator confsuion - could someone explain why this doesnt work


By : SM06
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Use the __construct function. This will set var when the class is loaded:
code :
class Base_Class {
        public $var;
        function __construct(){
            $this->var = (substr($_SERVER['HTTP_HOST'], -3) == 'dev') ? TRUE : FALSE;
        }
}
Javascript,if condition works without && logical operator when && is present it doesnt work

Javascript,if condition works without && logical operator when && is present it doesnt work


By : user3453949
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further No value of length can be at the same time greater than 20 and less than 3.
I think what you are trying to do is to set the error display of the length is more than 20 or less than 3, if so you need to use OR(||) logical operator
code :
if(length > 20 || length < 3){
    error.style.display="inline-block";
}
How do 'operator' functions work when they're defined in terms of a class rather than an actual operator?

How do 'operator' functions work when they're defined in terms of a class rather than an actual operator?


By : Azul
Date : March 29 2020, 07:55 AM
hop of those help? Re: "we're overloading an actual class". No. operator A() { return a; } is overloading an operator; note the keyword operator. This defines a conversion operator that will be used when the code calls for a conversion from an object of type B to an object of type A.
The use in your example is a bit obscure. Here's an easier example:
code :
B b;
A obj = b;
A obj = A::build();
python pygame animation works without class but as soon as i put it into a class it doesnt want to work?

python pygame animation works without class but as soon as i put it into a class it doesnt want to work?


By : user3716221
Date : March 29 2020, 07:55 AM
will help you There are 2 Indentation issues. The 1st is in player.draw:
code :
class player(object):
    # [...]

    def draw(self,win):

        if self.moveCount + 1 >= 9: 
            self.moveCount = 0

        #<--| INDENTATION !!!
        if self.left:
                win.blit(moveLeft[self.moveCount//3], (self.x,self.y)) 
                self.moveCount += 1
        elif self.right:
            # [...]
run = True
while run:
    # [...]

    else:       #this is incase the player is not moving
        man.left = False
        man.right = False
        man.up = False
        man.down = False
        man.moveCount = 0

    #<--| INDENTATION !!!
    redrawGameWindow()
moveRight = [pygame.transform.scale(pygame.image.load('R' + str(i+1) + '.png'), (40, 60)) for i in range(3)]
moveLeft  = [pygame.transform.scale(pygame.image.load('L' + str(i+1) + '.png'), (40, 60)) for i in range(3)]
moveUp    = [pygame.transform.scale(pygame.image.load('U' + str(i+1) + '.png'), (40, 60)) for i in range(3)]
moveDown  = [pygame.transform.scale(pygame.image.load('D' + str(i+1) + '.png'), (40, 60)) for i in range(3)]
character = pygame.transform.scale(pygame.image.load('D2.png'), (40, 60))
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