This and the other “Deck” posts are a repurposing of flashcard study decks to Q&A blog posts. Google was not showing love to this content as a set of flashcards and I didn’t want to delete them entirely, I hope you find it useful.
What is an Elixir Range?
It is way to work with a sequence of integers more effectively without having to explicitly define each integer in the sequence. It also helps with more efficiently checking if a values falls within a sequence of integers. Instead of having to write
[1,2,3,4,5, ...] you can instead write
Can a Range be either ascending or descending?
Yes the following two examples are both valid ranges:
How can pattern matching be used to set a variables to contain the values of the start and end integers of a range?
Using left hand assignment where the range variables are declared left of the equals sign (match operator) like so:
score_range = 2..20 start..finish = score_range => start 2 => finish 20 20
Do Enum module functions work with Ranges?
Enum module functionality is implemented for Ranges. Two example functions:
For your continued enjoyment: