for example:
[ (id=>1, email=>'[email protected]', name=>'tim'),
(id=>2, email=>'[email protected]', name=>'joe'),
(id=>3, email=>'[email protected]', name=>'dan') ]
How can I extract the email column and put it in its own array?
views:
49answers:
2
+7
A:
Let's call your array users. You can do this:
users.map{|u| u[:email]}
This looks at the hashes one by one, calling them u, extracts the :email key, and returns the results in a new array of user emails.
Peter
2010-09-30 06:59:34
You could also use users.collect{|u| u[:email]}, collect is an alias for map, which might be easier for some people (those who don't have a functional background).
Sven Koschnicke
2010-09-30 07:03:45
awesome! this worked perfectly. thanks a bunch
Tim
2010-09-30 16:57:45
+1
A:
[ {id=>1, email=>'[email protected]', name=>'tim'},
{id=>2, email=>'[email protected]', name=>'joe'},
{id=>3, email=>'[email protected]', name=>'dan'} ].map{|h| h['email']}
shingara
2010-09-30 07:00:06