Convert array to hash with custom format

Question

Can somebody help me to convert the following array to a hash with the following format?

Array

[["0", {"checkbox_2"=>"on"}], ["2", {"checkbox_1"=>"on"}]]

Hash

search=>{"checkbox_2"=>"on", "checkbox_1"=>"on"}

tokland · Accepted Answer · 2012-04-09 10:08:47Z

2

xs = [["0", {"checkbox_2"=>"on"}], ["2", {"checkbox_1"=>"on"}]]
search = {:search => xs.map { |n, h| h }.inject(:merge)}
# {:search=>{"checkbox_2"=>"on", "checkbox_1"=>"on"}}

answered Apr 9, 2012 at 10:08

tokland

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2 Comments

Michael Kohl Over a year ago

How about { :search => xs.map(&:last).inject(:merge) }?

tokland Over a year ago

@Michael: yeah, or (&:second) on Rails. Thing is, when getting from pairs I feel it's more clear to de-structure (in other languages those elements would be tuples, not arrays).

Roland Mai · Accepted Answer · 2012-04-09 09:44:24Z

1

arr = [["0", {"checkbox_2"=>"on"}], ["2", {"checkbox_1"=>"on"}]] 
hash = Hash[arr.flatten.select{|e| e.is_a? Hash}.collect{|e| e.to_a.flatten}]
=> {"checkbox_2"=>"on", "checkbox_1"=>"on"}

answered Apr 9, 2012 at 9:44

Roland Mai

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1 Comment

tokland Over a year ago

this way would be ok if the hash appeared in any position but if it's always in the second position, well, it's unnecessarily convoluted.

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