CODEWITHSUNDEEP
ruby-on-railshash
RSync
RSync

Reputation: 121

Rails - How to display all values in nested hash

I have a hash like:

{"1"=>{"asset_class_id"=>"12", "ratio"=>"121"},
"2"=>{"asset_class_id"=>"22", "ratio"=>"45"},
"3"=>{"asset_class_id"=>"32", "ratio"=>"9"},
"4"=>{"asset_class_id"=>"42", "ratio"=>""}}

What I want to achieve is to get all the values of the ratio and exclude empty values something like this:

["121", "45", "9"]

Upvotes: 0

Views: 919

Answers (6)

KcUS_unico
KcUS_unico

Reputation: 513

It's not the nicest code but you can start with this for one:

x = {"asset_class_id"=>"12", "ratio"=>"121"}
x.each do |key, value|
    if key=="ratio"
    puts value
end
end

Well, I've been a little late. Above solutions are better.

Upvotes: 1

Dmitriy Gusev
Dmitriy Gusev

Reputation: 151

hash = {"1"=>{"asset_class_id"=>"12", "ratio"=>"121"},
 "2"=>{"asset_class_id"=>"22", "ratio"=>"45"},
 "3"=>{"asset_class_id"=>"32", "ratio"=>"9"},
 "4"=>{"asset_class_id"=>"42", "ratio"=>""}}

After you can simply call that command

Hash[hash.to_a].values.map{|v| v[:ratio].if v[:ratio].present?}

Upvotes: 0

marmeladze
marmeladze

Reputation: 6564

below code will do trick, but this ({a,b,c}) is not valid ruby syntax. 

> newarr=[] 
> a.values.each {|x| newarr << x['ratio']}
 => [{"asset_class_id"=>"12", "ratio"=>"121"}, {"asset_class_id"=>"22", "ratio"=>"45"}, {"asset_class_id"=>"32", "ratio"=>"9"}, {"asset_class_id"=>"42", "ratio"=>""}] 
> newarr
 => ["121", "45", "9", ""]

UPDATE

inf first version of question, empty string was also included. to skip it, you should do, 

a.values.each {|x| newarr << x['ratio'] unless x['ratio'].blank? }

or, 

a.values.each {|x| newarr << x['ratio'] if x['ratio'].present? }

but be aware that, above 2 lines are rails only solutions.

below is ordinary ruby. 

a.values.each {|x| newarr << x['ratio'] unless x['ratio'].empty? }

Upvotes: 0

Uday kumar das
Uday kumar das

Reputation: 1613

Use this code:

arr = []
a.values.each {|e| arr << e["ratio"] if e["ratio"].present?}
puts arr

Upvotes: 0

Bharat soni
Bharat soni

Reputation: 2786

hash = {"1"=>{"asset_class_id"=>"12", "ratio"=>"121"},
     "2"=>{"asset_class_id"=>"22", "ratio"=>"45"},
     "3"=>{"asset_class_id"=>"32", "ratio"=>"9"},
     "4"=>{"asset_class_id"=>"42", "ratio"=>""}}



hash.values.map{|x| x['ratio']}.reject!(&:empty?)

Upvotes: 2

ste26054
ste26054

Reputation: 469

> hsh = {"1"=>{"asset_class_id"=>"12", "ratio"=>"121"},
 "2"=>{"asset_class_id"=>"22", "ratio"=>"45"},
 "3"=>{"asset_class_id"=>"32", "ratio"=>"9"},
 "4"=>{"asset_class_id"=>"42", "ratio"=>""}}

> hsh.values
=> [{"asset_class_id"=>"12", "ratio"=>"121"}, 
    {"asset_class_id"=>"22", "ratio"=>"45"}, 
    {"asset_class_id"=>"32", "ratio"=>"9"}, 
    {"asset_class_id"=>"42", "ratio"=>""}]

> hsh.values.map{|h| h["ratio"]}
=> ["121", "45", "9", ""]

> hsh.values.map{|h| h["ratio"]}.reject{|v| v.empty? }
=> ["121", "45", "9"]

Upvotes: 1

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