use .try function with .map function in ruby

Question

I need to get some values from the json record and extracting like below

curr_json_doc['title']['genre'].map { |s| s['name'] }.join(',')

But for some records curr_json_doc['title']['genre'] can be blank. So I want to use try function for map and join().

I tried like below

curr_json_doc['title']['genre'].try(:map, { |s| s['name'] }).try(:join, (','))

but it didnt work.

Answer 1

You don't pass block correctly. Blocks are passed to methods outside argument parenthesis:

curr_json_doc['title']['genre'].try(:map) { |s| s['name'] }.try(:join, ',')