Comparing JSON array objects to Ruby String

Question

I have a JSON array structured like this:

{"data":[{"Chris":[{"long":10,"lat":19}]},{"Scott":[{"long":9,"lat":18}]}]}

I am then reading from the array in ruby, and I have started to iterate through the JSON array like so:

objArray = JSON.parse(File.open('public/test.json').read);
sections = objArray["data"]

sections.each do |subsections|
        subsections.each do |supersub|
            supersub.each do |obj| 

                #Check if variable Usrname is equal to a name in the JSON array
            end
        end 
    end

As the comment in the loop says, I need to compare the variable Usrname to the names in the JSON array i.e "Chris" and "Scott" to see if Usrname matches any of them. How is this done?

maerics · Accepted Answer · 2014-04-03 15:30:41Z

2

username = 'Chris'
sections.each do |user_coords|
  user_coords.each do |user, coords|
    if user == username
      # Do stuff here...
      puts "OK: #{coords}"
    end
  end
end

# OK: [{"long"=>10, "lat"=>19}]

answered Apr 3, 2014 at 15:30

maerics

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3 Comments

Cj1m Over a year ago

Thanks, this worked. Do you know how I can then edit the coords of the name?

maerics Over a year ago

You can access them via user_coords[name] - that is the array of hashes of "lat/long" per user.

Cj1m Over a year ago

SO do I do it like this: rb_hash[user_coords[Usrname]] << {lng: Lng.to_i, lat: Lat.to_i}

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