Examples of using Singleton pattern in English and their translations into Portuguese
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Colloquial
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Official
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Medicine
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Financial
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Ecclesiastic
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Ecclesiastic
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Computer
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Official/political
The most obvious advantage of the singleton pattern is accessibility.
Conclusion The singleton pattern is simple and powerful, but it should be used sparingly.
In other words,the UIApplication class was designed with the singleton pattern in mind.
In most cases, the singleton pattern isn't the only solution available.
This is the case where we should consider developing a Singleton pattern for our base classes.
To implement the singleton pattern, we declare a type property, sharedInstance, of type Logger.
Another common approach for implementing the singleton pattern is by leveraging nested types.
Defensive coding techniques can give you the same result without the mental overhead of the singleton pattern.
You can check out my post about the singleton pattern in Java to learn more about it.
If you're familiar with iOS or OS X development,then you will notice that Apple's frameworks make use of the singleton pattern.
To implement the singleton pattern in Swift, we make use of class constants, which were introduced in Swift 1.2.
A few years ago,Miško Hevery wrote a great article about the singleton pattern in which he explains why the pattern should be avoided.
At first glance, the singleton pattern may look like a silver bullet or a golden hammer, but that is not what the singleton pattern is.
For example, if you're using a singleton only to make it easily accessible,then you may be using the singleton pattern for the wrong reasons.
I don't consider the singleton pattern an anti-pattern, but it is a pattern that should be used with caution.
As mentioned in the above definition, when we want to make sure that one and only one object needs to be created for any class,then we should implement the Singleton pattern for that class.
It's not because Apple uses the singleton pattern in its own frameworks that it is the right solution to every problem.
This puts the singleton pattern in a bad place and singletons are therefore considered a bad practice by many respected programmers.
In Python, a factory function f that instantiates a class A can be implemented as: def f(): return A()A simple factory function implementing the singleton pattern is: def f(): if f. obj is None: f. obj A() return f. obj f. obj None This will create an object when first called, and always return the same object thereafter.
As the EventBus library follows the singleton pattern, the instance of the event bus available to this Activity is the same as the instance available to the BroadcastReceiver.
Abraham Maslow When I first heard about the singleton pattern, I was excited about how useful it would be in my next project.
Similarly, using this definition,a singleton implemented by the singleton pattern is a formal factory- it returns an object, but does not create new objects beyond the single instance.
I have tried my best to explain the Singleton design pattern, which is widely discussed on the internet.