magpie

French IBANs are often prefixed with FR76

After one time too many stumbling over a forgotten/unknown function in Kotlin’s “collection” API, I decided to take stock of what’s available.

TLDR - That API is pretty large.

Sometimes it is useful to look at a subject from a slightly different perspective, this provides a sort of mental “binocular vision” and allows to flesh out some details that are less obvious otherwise.

Some languages provide a facility to return an error from a call to method/function, along with the actual result value. This allows (or forces) the programmer to take into account potential runtime errors.

Something similar can be done in Kotlin.

I enjoyed reading the The Fibonacci Problem blog post that shows (among other things) a tail recursive algorithm for the Fibonacci sequence.

An Armstrong number is “a number that is the sum of its own digits each raised to the power of the number of digits”