As many companies offering online services do, we handle multiple currencies. This often involves querying external services to know the real value of the currency exchange. Previously, this logic was scattered all over the code, even copy-pasted in multiple files, and is pretty hard to mantain, let alone to test.
So, in my work detecting and extracting patterns from old spaghetti code, I came with the following solution: A Service layer.
I'm in the real need to know if, given a string className or object, it implements a particular interface. I'm specially interested in the string className part.
During the search, many seemingly valid options appeared: instanceof, is_subclass_of, is_a, ReflectionClass::ImplementsInterface, class_implements… Which one to use? Let's do some testing!
I love SPL... so simple, so powerful, so flexible.
RecursiveDirectoryIterator was having problems while scanning a directory and threw me some nice errors on permissions, so I coded the snippet below...
Lately I'm spending some time coding some libraries in JS to achieve a solid & cross-browser framework. Not every browser out there supports the latest Javascript version, so a fallback solution is often needed. Some examples are the iterative methods in Array, as introduced in JS 1.7: every, filter, forEach, map, some, indexOf, lastIndexOf.
So, as extending a built-in is often a bad idea, the direction taken was to create a subclass of Array and extend this one. No wonder it's a hard path, but we can walk it on our own.
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