How to get a hash value by numeric index

Question

Have a hash:

h = {:a => "val1", :b => "val2", :c => "val3"} 

I can refer to the hash value:

h[:a], h[:c] 

but I would like to refer by numeric index:

h[0] => val1 h[2] => val3 

Is it possible?

Answer 1

h.values will give you an array requested.

> h.values # ⇒ [ #  [0] "val1", #  [1] "val2", #  [2] "val3" # ] 

UPD while the answer with h[h.keys[0]] was marked as correct, I’m a little bit curious with benchmarks:

h = {:a => "val1", :b => "val2", :c => "val3"} Benchmark.bm do |x|   x.report { 1_000_000.times { h[h.keys[0]] = 'ghgh'} }    x.report { 1_000_000.times { h.values[0] = 'ghgh'} } end    # #       user     system      total        real #   0.920000   0.000000   0.920000 (  0.922456) #   0.820000   0.000000   0.820000 (  0.824592) 

Looks like we’re spitting on 10% of productivity.