Ruby - Changing value of an array hashes value

Question

I have the following hash from a json decode:

{"person"=>{"user"=>[{"username"=>"foo", "status"=>"Y", "roles"=>["accounting", "sales"]}]}}

I basically want to change the roles value to be in a comma delimited sentence like doing value.to_sentence. How do I achieve this?

Can you clarify? Do you want to turn ["accounting", "sales"] into "accounting, sales"? — Linuxios
– Linuxios, Commented Feb 23, 2012 at 3:05

maerics · Accepted Answer · 2012-02-23 03:47:17Z

2

Try this:

def fix_roles(h)
  user0 = h['person']['user'][0]
  user0['roles'] = user0['roles'].join(', ')
end

[Edit] For example:

h = {"person"=>{"user"=>[{"username"=>"foo", "status"=>"Y", "roles"=>["accounting", "sales"]}]}}
fix_roles(h)
h # => {"person"=>{"user"=>[{"username"=>"foo", "status"=>"Y", "roles"=>"accounting, sales"}]}}

edited Feb 23, 2012 at 3:47

answered Feb 23, 2012 at 3:05

maerics

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4 Comments

oprogfrogo Over a year ago

I get TypeError: can't convert String into Integer

maerics Over a year ago

@oprogfrogo: if you copy your hash into a variable, say "h" and call "fix_roles(h)" then your hash will be modified as you describe.

oprogfrogo Over a year ago

Thanks for getting back to me. That works with the first element in the array. How can I make it update when there are multiple elements. Like this: h = {"person"=>{"user"=>[{"username"=>"foo", "status"=>"Y", "roles"=>["accounting", "sales"]}, {"username"=>"bar", "status"=>"Y", "roles"=>["customer service", "sales"]}]}}

oprogfrogo Over a year ago

Thanks for showing the path. I've figured out how to iterate through it and it works now:

oprogfrogo · Accepted Answer · 2012-02-23 19:01:36Z

1

Thanks to maerics example, I was able to achieve the solution by iterating through each array element:

def fix_roles(w)
  w['person']['user'].each do |arr|
    arr.each do |k,v|
      arr['roles'] = v.join(', ') if k == 'roles' 
    end
  end
end

answered Feb 23, 2012 at 19:01

oprogfrogo

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