An array of hashes -> an array of specific values

Question

I have an array of hashes

[{"var1"=>"1", "var2" => "123", "var3" => "456" }, {"var1"=>"12", "var2" => "1234", "var3" => "4567"}, {"var1"=>"13", "var2" => "1235", "var3" => "456789"}]

I want to get an array of values of var3

["456", "4567", "456789"]

map(& :var3) doesn't work.

How can I do that?

sawa · Accepted Answer · 2012-12-31 04:16:38Z

2

map(& :var3) will not work because there is no method var3, so :var3.to_proc will not work. Do this:

map{|h| h["var3"]}

or

map{|h| h.fetch("var3")}

answered Dec 31, 2012 at 4:16

sawa

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