Ruby: return a copy of array with [key, value] array from hash

Question

In Python there is dict.inspect() method that returns a list of tuples (link). Is there a similar method in ruby to achieve, well, an array of arrays?

#input
{:a => 1, :b => 2}

#result
[[:a, 1], [:b, 2]]

sepp2k · Accepted Answer · 2010-10-23 00:00:14Z

5

Calling to_a on the hash will do that.

{:a => 1, :b => 2}.to_a
#=> [[:b, 2], [:a, 1]]

As you can see in the example output, the order is not necessarily preserved (at least not in ruby 1.8, in ruby 1.9 the order is preserved).

answered Oct 23, 2010 at 0:00

sepp2k

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2 Comments

hurikhan77 Over a year ago

There's OrderedHash to preserve order.

Andrew Grimm Over a year ago

There's also sort, which may change the order, but give a consistent output.

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