There was an interesting discussion yesterday on the Elixir Slack about how libraries should handle errors. This is a more thought-through and elaborate expression on my views on the matter. In the post, I’ll present an idealised version of how I think a public API for functions that may produce errors should look like.»
The Unix Timestamps in Elixir post is by far my most popular one. Because a lot changed in recent Elixir versions when it comes to handling of calendar types (such as dates, datetimes and times), I though it might be a good idea to update it.»
Recently, at university, we had a class that introduced the idea of logic programming and explored a bit the Prolog language. I decided to play a bit more with it and write a Sudoku solver. Let’s see how it turned out.»
When building JSON APIs you often find yourself in a situation when you have part of the JSON already encoded and want to embed it in a bigger structure. A common solution is to decode the encoded part and embed the outer structure just to encode it back again. It’s obvious how that back-and-forth decoding and encoding is wasteful. Fortunately with poison we have a much better alternative.»
When Edsger Dijkstra wrote his famous letter “Go-to statement considered
harmful” in 1968 the programming world was split between goto-supporters and
goto-opponents. The first claimed goto simplifies programs and makes them faster,
the others argued it makes programs hard to follow and understand.
Today we live in a world where the goto-opponents clearly won. Almost all modern
programming languages are devoid of goto, and those that have it, use it
Yet today, according to many, we face another monster -
if. Some argue is
as harmful as goto and should be avoided at all cost.
Lists are a basic data structure in functional languages, but they are also
quite confusing for people accustomed to dealing with mutable arrays in
imperative languages. The two things: arrays and lists are used in similar
situations, they are however more different than it may seem. I’d like to
address that explaining how lists work and implementing couple of functions form
Enum module ourselves.