Sort Nested Hash Inside Array

Question

I have sample data like this:

[
  [{"calendar"=>{:start_date=>Thu, 07 Aug 2014, :title=>"Recurring Event Test", :has_downloads=>false, :description=>"<p>Recurring content</p>\r\n", :location=>"Lunch hall", :id=>243, :end_date=>Thu, 07 Aug 2014}}],
  [{"calendar"=>{:start_date=>Wed, 06 Aug 2014, :title=>"Single event", :has_downloads=>false, :description=>"<p>for date 6th</p>\r\n", :location=>"chennai", :id=>253, :end_date=>Wed, 06 Aug 2014}}] 
]

Need to sort this values by start_date field.

I tried like this

sort_by {|vn| vn[:start_date]}

its showing error nil class

What have you tried already, possibly after having a look at the various sort methods of arrays? Please show us the code. What were the issues with your approach? — Holger Just
– Holger Just, Commented Aug 6, 2014 at 13:48
You have an array of arrays, so do something like sort_by {|x| x.first[:start_date]} — Grych
– Grych, Commented Aug 6, 2014 at 13:56
@Grych am getting this error Symbol as array index - (TypeError) — Raj Adroit
– Raj Adroit, Commented Aug 6, 2014 at 13:58

Santhosh · Accepted Answer · 2014-08-06 14:03:14Z

3

vn is an Array and start_date is nested inside calendar. You should do

arr.sort_by {|vn| vn[0]["calendar"][:start_date]}

answered Aug 6, 2014 at 14:03

Santhosh

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2 Comments

Raj Adroit Over a year ago

Your old answer only working... arr.sort_by {|vn| vn["calendar"][:start_date]}

Santhosh Over a year ago

In your question, you have an array of arrays. If my previous answer works, then you probably have an array of hashes.

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