Flyweight pattern

The flyweight pattern enables the sharing of information in a resource-efficient way. You use it when you typically have the same information segment in a large number of objects and you decide to share this information between all of these large number of objects instead of having the same copy of information contained inside all of them.

For example, let's say in a software application, you have a list of a million employee records for a group of companies, and several thousands of employees belong to the same company and thus have similar information for their employer. Instead of having this information repeatedly copied into all of the employee objects, we share the common information into a separate object and let ...

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