Convert array to string with quotes

Question

How do I convert an array like:

[["hello"], ["world"]]

To:

"hello", "world"

I tried array.join(',')

But this would return:

"hello world"

What I want is a string with qoutes: ""hello", "world"".

---

For completeness:

I am trying to build this query from the array.

DELETE FROM table WHERE column IN ("hello", "world");

Answer 1

Try:

array.map{|s| "\"#{s}\""}.join(', ')

Update:

With structure [['a'],['b'] do:

array.map{|s| "\"#{s.first}\""}.join(', ')

Answer 2

I'd do like this:

array.map { |a| a.first.inspect }.join(', ')
# => "\"hello\", \"world\""

Update: a couple of alternative solutions:

array.flatten.map(&:inspect).join(', ')
# => "\"hello\", \"world\""

Using the String#quote method from Ruby Facets:

require 'facets/string/quote'
array.flatten.map(&:quote).join(', ')
# => "\"hello\", \"world\""