Ruby on Rails convert list to array

Question

the following query return as follow:

@cref = Creference.all
@cref = @cref.group_by{|cc| cc["name"]}

result: Object {US: Array[1], UK: Array[1]}

And these query return the result as:

@countries = Product.joins(:user).distinct.where("state is not null and country <> ''").where(:users => {:merchant_status => 1}).pluck(:country)
@countries.map! {|country| country.split.map(&:capitalize).join(' ')}
@countries = @countries.uniq

result: ["US", "UK"]

I am using gon to pass the result to the country drop down list:

gon.search_location_list = @countries +  @cref

How can I make the first result format to match the second one? Thanks!!!

hey you can use as @countries + @cref.keys

Vishal Jain
– Vishal Jain

2016-04-05 06:28:07 +00:00
Commented Apr 5, 2016 at 6:28 — Vishal Jain
– Vishal Jain, Commented Apr 5, 2016 at 6:28
Vishal is right. This is the best solution.

Awais Shafqat
– Awais Shafqat

2016-04-05 06:30:59 +00:00
Commented Apr 5, 2016 at 6:30 — Awais Shafqat
– Awais Shafqat, Commented Apr 5, 2016 at 6:30

shivam · Accepted Answer · 2016-04-05 06:29:58Z

1

How can I make the first result format to match the second one?

In your first example you are using group_by which returns a Hash. In second example you are using map which returns an Array. Use the same thing both places to get similar format.

@cref = @cref.map{|cc| cc["name"]}
# ["US", "UK"]

answered Apr 5, 2016 at 6:29

shivam

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Matt C · Accepted Answer · 2016-04-05 06:29:22Z

0

After your first two lines, add this line:

@cref = @cref.values

answered Apr 5, 2016 at 6:29

Matt C

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Awais Shafqat · Accepted Answer · 2016-04-05 06:39:07Z

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In short you question is that you want to concatenate array values with hash keys. So for this the simplest solution is

@cref = @cref.group_by{|cc| cc["name"]}.keys

This would return the keys in array format and than you can concatenate. But that would result is same value but you can call uniq() on it.

answered Apr 5, 2016 at 6:39

Awais Shafqat

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