Is there a more efficient way to turn an array into a hash?

Question

I think that my method is a little clumsy, and that there is likely to be a one-liner that I'm missing. Ideas?

def _to_hash 
    hsh = {}
    self.each_slice(2){|v| hsh[v[0]] = v[1]}
    hsh
end

1.9.3-p0 :003 > ["a", 1, "b", 2]._to_hash
{
    "a" => 1,
    "b" => 2
}

possible duplicate of Array to Hash Ruby

Andrew Grimm
– Andrew Grimm

2011-12-12 02:16:48 +00:00
Commented Dec 12, 2011 at 2:16 — Andrew Grimm
– Andrew Grimm, Commented Dec 12, 2011 at 2:16

Jakub Hampl · Accepted Answer · 2011-12-12 00:29:12Z

4

@phiggy's method is correct, but also remember that you can use a splat operator:

a = ["a", 1, "b", 2]
Hash[*a] #=> {"a"=>1, "b"=>2}

answered Dec 12, 2011 at 0:29

Jakub Hampl

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phiggy · Accepted Answer · 2011-12-12 00:27:28Z

3

You want Hash's .[] operator:

> Hash["a", 1, "b", 2]
 => {"a"=>1, "b"=>2}

answered Dec 12, 2011 at 0:27

phiggy

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