What is a singleton pattern?
Singleton pattern is a design pattern that allows us to use a single instance of a class everywhere.
Implementation
class ClassName {
static ClassName _className;
ClassName._createInstance();
factory ClassName() {
if (_className == null) {
_className = ClassName._createInstance();
}
return _className;
}
}
Factory constructors return an instance of the class, but it doesn't necessarily create a new instance.
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Originally published on blog.bibekkakati.me
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