I was working with multi-dimensional arrays. I found a problem - I needed to remove one level of the nested array. How to do it with a single method?
I took a look at the
flatten definition, and I found that it can take addition argument -
If you call
flatten without additional arguments, it will flatten an array recursively. But you can specify how many
array levels should be “removed” by using the additional argument.
[[1,[2,3]], 4].flatten #=> [1,2,3,4] [[1,[2,3]], 4].flatten(1) #=> [1,[2,3],4]