Convert multiple level array to single level array?

Question

I want to convert this array

[[["b", "c"], ["c", "d"]], [["v", "e"], ["r", "g"]]]

into

[["b", "c"], ["c", "d"], ["v", "e"], ["r", "g"]]

How can I convert this ?

Answer 1

Array#flatten takes an optional level:

The optional level argument determines the level of recursion to flatten

Example:

[[["b", "c"], ["c", "d"]], [["v", "e"], ["r", "g"]]].flatten(1)
#=> => [["b", "c"], ["c", "d"], ["v", "e"], ["r", "g"]]