Simple way to loop through ruby on rails array

Question

Could someone point me in the right direction about looping through an array and extracting the required values. It's causing me issues understanding it:

array = [{"response_message"=>nil, "response_client_message"=>nil, "response_customer_message"=>nil, "closed"=>true, "updated_at"=>2012-05-30 13:20:49 UTC, "created_at"=>2012-05-30 13:20:29 UTC, "token"=>"2fda85eab962fa6e27850605f2f948ca", "price"=>"$24.00", "amount"=>#<BigDecimal:7fa3f4485428,'0.24E2',9(18)>, "currency_code"=>"USD", "metadata"=>"{\"xxx\": 5, \"xxx\": 250, \"xxx\": true, \"support\": { \"email\": true, \"phone\": false } }", "line_items"=>[{"amount"=>#<BigDecimal:7fa3f4482fe8,'0.24E2',9(18)>, "notes"=>nil, "currency_code"=>"USD", "description"=>"1 day", "price"=>"$24.00", "feature_level"=>"{\"hotspots\": 5, \"vouchers\": 250, \"customizable_logins\": true, \"support\": { \"email\": true, \"phone\": false } }", "metadata"=>"{\"hotspots\": 5, \"vouchers\": 250, \"customizable_logins\": true, \"support\": { \"email\": true, \"phone\": false } }"}]}]

One of these is generated each day, I need to loop through and present a few values. I've tried this:

array.select{|elem| elem[:updated_at]}

But that gives me a [].

How do I loop through this and extract the values? I also need to understand how to get the line_items array out too.

Thanks

Yuri Barbashov · Accepted Answer · 2012-05-31 10:26:16Z

2

array.select{|elem| elem["updated_at"]}

pass string not a symbol

answered May 31, 2012 at 10:26

Yuri Barbashov

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kfb · Accepted Answer · 2012-05-31 10:28:30Z

1

It's not entirely clear what you're after, but if you want to extract values from that array, try map:

array.map { |elem| elem["updated_at"] }

This will return you a list of all the "updated_at" values.

answered May 31, 2012 at 10:28

kfb

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Seb Jacobs · Accepted Answer · 2012-05-31 10:33:00Z

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if you want to loop through an array and collect the updated_at values, then you should use the collect/map method. In your example you are referencing elem[:updated_at] which is not the same as elem["updated_at"]

array.collect{|elem| elem["updated_at"]}

answered May 31, 2012 at 10:33

Seb Jacobs

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