My favorite Ruby thing this week: when *my_array
This week we added a feature where our texting club customers can define their own aliases for the JOIN keyword, so they can track and measure which advertising is attracting people to JOIN. (For example a receipt might say “Text JOIN to…” while a sign in a bus might say “Text SNOWBUNNY to ….”)
In Ruby, the basic use of case / when is something like:
case keyword when "KEYWORD1" # do something when "KEYWORD2" # do something else end
In this case, the when needs to evaluate run-time data, not compile-time data. In Ruby it is trivially simply to implement run-time comparison arguments for a case – when statement by using an array name as the argument to the when clause.
The solution with Ruby is trivially simple: use
join_aliases = ("JOIN " + myaccount.join_aliases.to_s).split(" ") # sets join_aliases = ["JOIN", "SNOWBUNNY", "SNOW"] case keyword when *join_aliases # do JOIN stuff