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struct Me {
let name = "Takuhiro Muta"
let aka = "417.72KI"
let experienceYears = 5
let company = "iRidge inc."
let twitter = "417_72ki"
let qiita = "417_72ki"
let gitHub = "417-72KI"
let products = [
"BuildConfig.swift",
"MockUserDefaults",
]
}
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class Duck:
def walk(self):
print("Duck walking")
def quack(self):
print("Quack!!")
class Dog:
def walk(self):
print("Dog walking")
def bark(self):
print("Bark!!")
def walk_and_quack(animal):
animal.walk()
animal.quack()
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class Duck:
def walk(self):
print("Duck walking")
def quack(self):
print("Quack!!")
class Dog:
def walk(self):
print("Dog walking")
def bark(self):
print("Bark!!")
def walk_and_quack(animal):
animal.walk()
animal.quack()
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class Duck:
def walk(self):
print("Duck walking")
def quack(self):
print("Quack!!")
class Dog:
def walk(self):
print("Dog walking")
def bark(self):
print("Bark!!")
def walk_and_quack(animal):
animal.walk()
animal.quack()
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class Duck:
def walk(self):
print("Duck walking")
def quack(self):
print("Quack!!")
class Dog:
def walk(self):
print("Dog walking")
def bark(self):
print("Bark!!")
def walk_and_quack(animal):
animal.walk()
animal.quack()
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walk_and_quack(Duck())
# Duck walking
# Quack!!
walk_and_quack(Dog())
# Dog walking
# AttributeError: 'Dog' object has
# no attribute 'quack'
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*O0CK$
@interface Duck: NSObject
- (void)walk;
- (void)quack;
@end
@implementation Duck
- (void)walk {
NSLog(@"Duck walking");
}
- (void)quack {
NSLog(@"Quack!!");
}
@end
void walkAndQuack(id animal) {
[animal walk];
[animal quack];
}
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*O0CK$
@interface Duck: NSObject
- (void)walk;
- (void)quack;
@end
@implementation Duck
- (void)walk {
NSLog(@"Duck walking");
}
- (void)quack {
NSLog(@"Quack!!");
}
@end
void walkAndQuack(id animal) {
[animal walk];
[animal quack];
}
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*O0CK$
@interface Duck: NSObject
- (void)walk;
- (void)quack;
@end
@implementation Duck
- (void)walk {
NSLog(@"Duck walking");
}
- (void)quack {
NSLog(@"Quack!!");
}
@end
void walkAndQuack(id animal) {
[animal walk];
[animal quack];
}
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*O0CK$
walkAndQuack([Duck new]);
// Duck walking
// Quack!!
walkAndQuack([Dog new]);
// Dog walking
// unrecognized selector sent to instance
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