I think the easiest way is to declare a simple object literal: If you want private members on your singleton instance, you can do something like this: This has been called the module pattern, and it basically allows you to encapsulate private members on an object, by taking advantage of the use of closures. If … Read more
I try to tar.gz a directory and use The resulting tar includes .svn directories in subdirs but NOT in the current directory (as * gets expanded to only ‘visible’ files before it is passed to tar I tried to tar -czf workspace.tar.gz . instead but then I am getting an error because ‘.’ has changed … Read more
I like thinking about design pattens in terms of my classes being ‘people,’ and the patterns are the ways that the people talk to each other. So, to me the factory pattern is like a hiring agency. You’ve got someone that will need a variable number of workers. This person may know some info they … Read more
What makes you say that either a singleton or a static method isn’t thread-safe? Usually both should be implemented to be thread-safe. The big difference between a singleton and a bunch of static methods is that singletons can implement interfaces (or derive from useful base classes, although that’s less common, in my experience), so you can pass … Read more
The Difference Between The Two The main difference between a “factory method” and an “abstract factory” is that the factory method is a method, and an abstract factory is an object. I think a lot of people get these two terms confused, and start using them interchangeably. I remember that I had a hard time … Read more
I don’t actually think that DI/IoC are that uncommon in Python. What is uncommon, however, are DI/IoC frameworks/containers. Think about it: what does a DI container do? It allows you to wire together independent components into a complete application … … at runtime. We have names for “wiring together” and “at runtime”: scripting dynamic So, a DI container is nothing … Read more
I don’t actually think that DI/IoC are that uncommon in Python. What is uncommon, however, are DI/IoC frameworks/containers. Think about it: what does a DI container do? It allows you to wire together independent components into a complete application … … at runtime. We have names for “wiring together” and “at runtime”: scripting dynamic So, a DI container is nothing … Read more
First of all, there are cases when object construction is a task complex enough to justify its extraction to another class. I believe this point is incorrect. The complexity doesn’t really matter. The relevance is what does. If an object can be constructed in one step (not like in the builder pattern), the constructor is … Read more
There are lot of examples explaining MVP pattern using ASP.NET but not found anything using PHP. I am PHP programmer and want to know where can I get MVP pattern PHP examples?
I was going to write up my own explanation but this Wikipedia article pretty much sums it up. Here is the basic concept: Copy-on-write (sometimes referred to as “COW”) is an optimization strategy used in computer programming. The fundamental idea is that if multiple callers ask for resources which are initially indistinguishable, you can give them pointers … Read more