Short Screencasts of Gourmet Ruby, by Avdi Grimm
Occasionally we come across objects where we don’t care about their identity. All that matters, as far as equivalence is concerned, is their state, otherwise known as their value. There is a pattern name for objects like this: Value Objects.
— Avdi, in Hash Equality
Today we learn about Ruby gem that makes it easier to build immutable value objects.
Today's episode deals with a small matter of style, one that can have an impact on how easy it is to refactor code.
Have you ever wondered why Ruby has both #to_i and #to_int methods? Or both #to_a and #to_ary? In today's episode we'll answer this question, and look at how we can …
In this episode we look at how to convert our Feet objects back to core numeric types. In the process, we gain the ability to use our Feet objects in …
For core types like Float, Ruby has both conversion methods (#to_f), and conversion functions (Float()). When should we use one vs. the other? This episode attempts to answer that question.
In this episode we create a function for converting arbitrary values into Feet objects.
Ruby generally doesn't allow mixing of types without explicit conversion. So have you ever wondered why it's possible to multiply 2.3 (a float) by 5 (an integer)? In today's episode …
Building on the previous episode on hash tables, today we tackle the concept of hash equality: how Ruby decides if two objects are the same for the purpose of use …
