remove Create or append to array in Ruby

ruby uniq (3)

foo ||= []
foo << :element

Feels a little clunky. Is there a more idiomatic way?

You also could benefit from the Kernel#Array, like:

# foo = nil
foo = Array(foo).push(:element)
# => [:element]

which has the benefit of flattening a potential Array, like:

# foo = [1]
foo = Array(foo).push(:element)
# => [1, :element]

You can always use the push method on any array too. I like it better.

(a ||= []).push(:element)

(foo ||= []) << :element

But meh. Is it really so onerous to keep it readable?