Month: February 2017

General rule of thumb is if you have a collection of objects, you should build custom iterators so that users could readily use them like they do with other collection such as Array, Hash, File, etc. The easiest way to do this...

Generally if your class has an array/hash, sometimes you don’t want to expose the implementation of those collections outside of the object. Creating your own iterator will make your object easier to use. class Headphone...

Sometimes the scope of a local variable is a bit confusing when working with blocks. For example, the following will result in an “undefined local variable” for variables “x” and “bacon”...