Ruby Loop Array and Create Hash for Each Array Object - ruby

Question

I'd like to loop through an array and create a hash for each object in the array, then group all those hashes into an array of hashes.
Here's an example starting array for me:
urls = ["http://stackoverflow.com", "http://example.com", "http://foobar.com"]
Now let's say I'd like to have a hash for each of those URLs into an array like this:
urls =[ {
'url' => "http://stackoverflow.com",
'dns_status' => "200",
'title' => "Stack Overflow"
},
{
'url' => "http://example.com",
'dns_status'=> "200",
'title' => "Example"
}
]
Leaving aside where I get the values for the dns_status and title keys in the example, I guess what I'm missing is how to loop through the original array and create a hash for each object...
I've played around with inject, collect, map and each and read through the docs but can't quite make sense of it or get anything to work.
Any recommendation? Will this be easier to accomplish with a class?
EDIT:
Thanks for your help everyone. Figured this out and got it working. Cheers!

Answer 1

Do something with each element of something enumerable and store the result in an array: that is what map does. Specify what you want in the block, like this:
urls = ["http://stackoverflow.com", "http://example.com", "http://foobar.com"]
p res = urls.map{|url| {"url"=>url, "dns_status"=>200, "title"=>url[7..-5]} }
#=> [{"url"=>"http://stackoverflow.com", "dns_status"=>200, "title"=>"stackoverflow"}, {"url"=>"http://example.com", "dns_status"=>200, "title"=>"example"}, {"url"=>"http://foobar.com", "dns_status"=>200, "title"=>"foobar"}]

Answer 2

"what I'm missing is how to loop through the original array and create a hash for each object..."
urls = [
"http://stackoverflow.com",
"http://example.com",
"http://foobar.com"
]
urls.each {|entry|
puts entry
}
You could use .map! for instance. But I am still not sure what your target result ought to be. How about this?
urls.map! {|entry|
{ 'url' => entry, 'dns_status' => "200", 'title' => "Stack Overflow"}
}
urls # => [{"url"=>"http://stackoverflow.com", "dns_status"=>"200", "title"=>"Stack Overflow"}, {"url"=>"http://example.com", "dns_status"=>"200", "title"=>"Stack Overflow"}, {"url"=>"http://foobar.com", "dns_status"=>"200", "title"=>"Stack Overflow"}]
Yikes, the result is hard to see. It is this:
[
{
"url"=>"http://stackoverflow.com",
"dns_status"=>"200",
"title"=>"Stack Overflow"
},
{
"url"=>"http://example.com",
"dns_status"=>"200",
"title"=>"Stack Overflow"
},
{
"url"=>"http://foobar.com",
"dns_status"=>"200",
"title"=>"Stack Overflow"
}
]
Obviously, you need to still supply the proper content for title,
but you did not give this in your original question so I could not
fill it in.