I have left my ruby books at home. I am looking at some code that has
stuff like
use Rack::Flash
and some other more complex statements similar to that. I am not sure
what “use” does and it is too common a word to google. Any links or
explanations would be appreciated …
I have left my ruby books at home. I am looking at some code that has
stuff like
use Rack::Flash
This (in a rack configuration file) tells rack to add the Rack::Flash
middleware to the middleware stack. Hopefully that gives you something
more explicit to google for
Here is another one I don’t quite understand. It seems like
RequestLog is used for logging http requests,
but I am not sure how it is getting set up. The second part
where :logger is seen doesn’t quite make sense either.
Is the ruby use statement similar to the Perl use statement ? I saw
some site trying to explain it in Perl a bit. I guess I need to try to
locate my Programming in Ruby book tonight hopefully.
if $config[‘mongo’]
begin
require 'request_log'
# customize the middleware with our own fields
use RequestLog::Middleware,
:logger => lambda { |data|
Here is another one I don’t quite understand. It seems like
RequestLog is used for logging http requests,
but I am not sure how it is getting set up. The second part
where :logger is seen doesn’t quite make sense either.
Is the ruby use statement similar to the Perl use statement ? I saw
some site trying to explain it in Perl a bit. I guess I need to try to
locate my Programming in Ruby book tonight hopefully.
There is no ruby use statement. Rack defines a use method (probably
using instance_eval, which is why it looks like you’re calling a top
level method) that takes a class as its argument, instantiates it and
pushes it onto its list of middlewares
Fred
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