Rails - Mar 2006 - The RoR equivalent of out.write() in JSP?

All,

In JSP, I can output strings in the Web page by either

<%= foo %> //foo is a string or returns a string
or
<% out.write("test") %> //write directly to the output stream.

What is the method of "writing to the output stream" in RoR? 
Basically,
what is the equivalent of out.write()?

I have an if then statement that I want to put around a call to

h some_stuff

Thanks,
Wes


-- 
Posted via http://www.ruby-forum.com/.

Not entirely sure what out.write() does (just outputs to the page, I
guess?).  If you want to conditionally display something though, do

<%= h some_stuff if some_cond? %>

If it''s a bit more complex you can do
<% if some_cond? %>
<%= h some_stuff %>
<%= h some_other_stuff %>
<% end %>

<%= expression %> writes the result of expression to the page.

Pat



On 3/14/06, Wes Gamble <weyus@att.net> wrote:
> All,
>
> In JSP, I can output strings in the Web page by either
>
> <%= foo %> //foo is a string or returns a string
> or
> <% out.write("test") %> //write directly to the output
stream.
>
> What is the method of "writing to the output stream" in RoR? 
Basically,
> what is the equivalent of out.write()?
>
> I have an if then statement that I want to put around a call to
>
> h some_stuff
>
> Thanks,
> Wes
>
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

I''m sure he knows what <%= expression %> does since he mentioned
it first :)

I don''t have an answer Wes, but I''ve wished for the same
thing.
Sometimes it is just aesthetically nicer to use something like
out.write() in a <% %> code block. Perhaps it affects people who use
color coded editors more...

On 3/14/06, Pat Maddox <pergesu@gmail.com> wrote:
> Not entirely sure what out.write() does (just outputs to the page, I
> guess?).  If you want to conditionally display something though, do
>
> <%= h some_stuff if some_cond? %>
>
> If it''s a bit more complex you can do
> <% if some_cond? %>
> <%= h some_stuff %>
> <%= h some_other_stuff %>
> <% end %>
>
> <%= expression %> writes the result of expression to the page.
>
> Pat
>
>
>
> On 3/14/06, Wes Gamble <weyus@att.net> wrote:
> > All,
> >
> > In JSP, I can output strings in the Web page by either
> >
> > <%= foo %> //foo is a string or returns a string
> > or
> > <% out.write("test") %> //write directly to the output
stream.
> >
> > What is the method of "writing to the output stream" in RoR?
Basically,
> > what is the equivalent of out.write()?
> >
> > I have an if then statement that I want to put around a call to
> >
> > h some_stuff
> >
> > Thanks,
> > Wes
> >
> >
> > --
> > Posted via http://www.ruby-forum.com/.
> > _______________________________________________
> > Rails mailing list
> > Rails@lists.rubyonrails.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

--
Dav Yaginuma
http://AkuAku.org/

Yeah, it just seems so cheesy to me to do

<% if %>
<%= stuff %>
<% else %>
<%= other stuff %>
<% end %>

especially since we _know_ there _must_ be some kind of handle to the 
output stream anyway.

Actually, maybe not at the Ruby level - I don''t understand the IO model
for Ruby yet, so I can''t say.  But it seems like there should be some 
suitable abstraction, no?

Anyhow, cheese is ok for now :)

Wes


Dav Yaginuma wrote:
> I''m sure he knows what <%= expression %> does since he
mentioned it
> first :)
> 
> I don''t have an answer Wes, but I''ve wished for the same
thing.
> Sometimes it is just aesthetically nicer to use something like
> out.write() in a <% %> code block. Perhaps it affects people who use
> color coded editors more...
> 
> On 3/14/06, Pat Maddox <pergesu@gmail.com> wrote:
>>
>> >
>> >
>> >
>> _______________________________________________
>> Rails mailing list
>> Rails@lists.rubyonrails.org
>> http://lists.rubyonrails.org/mailman/listinfo/rails
>>
> 
> 
> --
> Dav Yaginuma
> http://AkuAku.org/

-- 
Posted via http://www.ruby-forum.com/.

Wes Gamble wrote:
> Yeah, it just seems so cheesy to me to do
> 
> <% if %>
> <%= stuff %>
> <% else %>
> <%= other stuff %>
> <% end %>
> 
Try:

<%= if some_condition
         some_code_evaluating_to_a_string
     else
         some_other_string
     end %>

That works because if actually returns a value...

-- 
Alex

Alex,

Thanks - that makes a lot of sense.

:)

Wes

Alex Young wrote:
> Wes Gamble wrote:
>> Yeah, it just seems so cheesy to me to do
>> 
>> <% if %>
>> <%= stuff %>
>> <% else %>
>> <%= other stuff %>
>> <% end %>
>> 
> Try:
> 
> <%= if some_condition
>          some_code_evaluating_to_a_string
>      else
>          some_other_string
>      end %>
> 
> That works because if actually returns a value...

-- 
Posted via http://www.ruby-forum.com/.

On Mar 14, 2006, at 12:09 PM, Wes Gamble wrote:
> All,
>
> In JSP, I can output strings in the Web page by either
>
> <%= foo %> //foo is a string or returns a string
> or
> <% out.write("test") %> //write directly to the output
stream.
>
> What is the method of "writing to the output stream" in RoR?   
> Basically,
> what is the equivalent of out.write()?
you can use two ways to do this:

<% _erbout << "foo" %>
OR
<% concat("foo", binding) %>

Neither of which is very pretty ;)

>
> I have an if then statement that I want to put around a call to
>
> h some_stuff
>
> Thanks,
> Wes
>
>
> -- 
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
-Ezra Zygmuntowicz
Yakima Herald-Republic
WebMaster
http://yakimaherald.com
509-577-7732
ezra@yakima-herald.com

Conditional expressions work:

<%= (1==1) ? ''yep'' : ''nope'' %>
<%= (1==2) ? ''yep'' : ''nope'' %>


Joe

-- 
Posted via http://www.ruby-forum.com/.

On Tue, 14 Mar 2006 21:09:36 +0100, Wes Gamble wrote:
> What is the method of "writing to the output stream" in RoR? 
Basically,
> what is the equivalent of out.write()?
> 
> I have an if then statement that I want to put around a call to
Usually, when I''ve wanted to do that, I realized that the view was
actually
getting too complicated, and the code really belonged in either the model
or a helper... I''m not saying that''s always the case, but
it''s something to
consider.

Jay Levitt