12 July 2021

TIL Elixir's for comprehension supports filtering

TIL about the filtering support in Elixir’s for comprehensions (“don’t call it a loop”):

# Create a record every 5 seconds for a day
for seconds <- 0..(60 * 60 * 24),
    rem(seconds, 5) == 0 do

For more on the amazing superpowers of the for comprehension, see Mitch Hanberg’s Comprehensive Guide to Elixir’s List Comprehension.