How to convert string in hash to integer

Question

I have built a form tag and gotten values selected from a user. This is what I get:

params[:user_answer_ids] = {"170"=>["599"], "162"=>["561", "563", "565"], "160"=>["549", "550"]}

Now I want to convert all string in this hash to int, like:

params[:user_answer_ids] = {170=>[599], 162=>[561, 563, 565], 160=>[549, 550]}

I want to convert to int because I want to compare question and answer ids later. Currently I have to use to_i method when looping in a hash, so I want to know whether there is any way to convert all string to int at once.

Chris Salzberg · Accepted Answer · 2012-12-01 14:59:51Z

3

You could fake it...

h={"170"=>["599"], "162"=>["561", "563", "565"], "160"=>["549", "550"]}
h.default_proc = proc{|h,k| h.key?(k.to_s) ? h[k.to_s].map(&:to_i) : nil}
p h[162]

Leaves the data unchanged.

edited Dec 1, 2012 at 14:59

Chris Salzberg

27.4k4 gold badges79 silver badges84 bronze badges

answered Dec 1, 2012 at 14:55

steenslag

80.3k16 gold badges144 silver badges174 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Rik Poggi Over a year ago

Shouldn't be best to just retrieve the key and if it's not nil convert it to_i?

Healer Over a year ago

I like it, with the data unchanged.

Collectives™ on Stack Overflow

How to convert string in hash to integer

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related