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Rajeev Kala

2007-Nov-07 14:48 UTC

Help on loop

Hey,

I have got a script that returns a long list of font family names, which
I all want to store in a variable (array). I tried doing this with @f
font.family also in the for loop below but it only prints the last item
when I want to display the results.


require ''rubygems''
require ''RMagick''
include Magick

for font in Magick.fonts
 puts font.family
end


Any suggestions?

Cheers
-- 
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ebeard

2007-Nov-07 15:13 UTC

head link

Re: Help on loop

Try this:

families = Magick.fonts.map{|f| f.family}



On Nov 7, 9:48 am, Rajeev Kala
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:> Hey,
>
> I have got a script that returns a long list of font family names, which
> I all want to store in a variable (array). I tried doing this with @f >
font.family also in the for loop below but it only prints the last item
> when I want to display the results.
>
> require ''rubygems''
> require ''RMagick''
> include Magick
>
> for font in Magick.fonts
>  puts font.family
> end
>
> Any suggestions?
>
> Cheers
> --
> Posted viahttp://www.ruby-forum.com/.

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Rajeev Kala

2007-Nov-07 15:17 UTC

head link

Re: Help on loop

Thanks mate I managed to find a way:

a = []

Magick.fonts do |font|
  a << font.family
end

puts a[29]

But your one liner works too :-)

Cheers



ebeard wrote:> Try this:
> 
> families = Magick.fonts.map{|f| f.family}
> 
> 
> 
> On Nov 7, 9:48 am, Rajeev Kala
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
-- 
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Bob Showalter

2007-Nov-07 15:35 UTC

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Re: Help on loop

On Nov 7, 2007 9:48 AM, Rajeev Kala
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:>
> Hey,
>
> I have got a script that returns a long list of font family names, which
> I all want to store in a variable (array). I tried doing this with @f >
font.family also in the for loop below but it only prints the last item
> when I want to display the results.
>
>
> require ''rubygems''
> require ''RMagick''
> include Magick
>
> for font in Magick.fonts
>  puts font.family
> end
Using

   @f = font.family

will overwrite @f each time through the loop. That''s why you see only
the last value.

If you wanted to build up an array, you could write:

   @f = []
   for font in Magick.fonts
     @f << font.family
   end

But you can do this all in one line:

   @f = Magick.fonts.collect &:family

(I''m assuming you''re doing this in a Rails app. If
you''re doing it in
a standalone script, you would need to add "require
''active_support''"
for the &:family thingy to work)

This is equivalent to what ebeard showed, but uses some new sugar
Rails gives you. See
http://pragdave.pragprog.com/pragdave/2005/11/symbolto_proc.html. I
think this is going to be standard in Ruby 1.9.

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Rajeev Kala

2007-Nov-07 16:06 UTC

head link

Re: Help on loop

Thanks for that Bob got it working. I got another question the names I 
have stored in my array I want to display them as a drop down menu. 
Basically I want something like the code below, but the array contains 
hundreds of names so entering them all manually would be wasting my 
time.

<select name="font">
  <option value="">Select a font</option>
  <option value="">----------------------</option>

        <option value="Verdana">Verdana</option>

        <option value="Times New Roman">Times New
Roman</option>
  <option value="Arial">Arial</option>
  <option value="Zrnic">Zrnic</option>
        .........
</select>


Cheers

Bob Showalter wrote:> On Nov 7, 2007 9:48 AM, Rajeev Kala
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
> wrote:
>> require ''RMagick''
>> include Magick
>>
>> for font in Magick.fonts
>>  puts font.family
>> end
> 
> Using
> 
>    @f = font.family
> 
> will overwrite @f each time through the loop. That''s why you see
only
> the last value.
> 
> If you wanted to build up an array, you could write:
> 
>    @f = []
>    for font in Magick.fonts
>      @f << font.family
>    end
> 
> But you can do this all in one line:
> 
>    @f = Magick.fonts.collect &:family
> 
> (I''m assuming you''re doing this in a Rails app. If
you''re doing it in
> a standalone script, you would need to add "require
''active_support''"
> for the &:family thingy to work)
> 
> This is equivalent to what ebeard showed, but uses some new sugar
> Rails gives you. See
> http://pragdave.pragprog.com/pragdave/2005/11/symbolto_proc.html. I
> think this is going to be standard in Ruby 1.9.
-- 
Posted via http://www.ruby-forum.com/.

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ebrad

2007-Nov-07 16:18 UTC

head link

Re: Help on loop

Something like this maybe?

<%= select("SomeModel", "SomeAttribute", @f {|f| [ f ]
}), :prompt =>
"Select a font" %>


On Nov 7, 11:06 am, Rajeev Kala
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:> Thanks for that Bob got it working. I got another question the names I
> have stored in my array I want to display them as a drop down menu.
> Basically I want something like the code below, but the array contains
> hundreds of names so entering them all manually would be wasting my
> time.
>
> <select name="font">
>   <option value="">Select a font</option>
>   <option value="">----------------------</option>
>
>         <option value="Verdana">Verdana</option>
>
>         <option value="Times New Roman">Times New
Roman</option>
>   <option value="Arial">Arial</option>
>   <option value="Zrnic">Zrnic</option>
>         .........
> </select>
>
> Cheers
>
>
>
> Bob Showalter wrote:
> > On Nov 7, 2007 9:48 AM, Rajeev Kala
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
> > wrote:
> >> require ''RMagick''
> >> include Magick
>
> >> for font in Magick.fonts
> >>  puts font.family
> >> end
>
> > Using
>
> >    @f = font.family
>
> > will overwrite @f each time through the loop. That''s why you
see only
> > the last value.
>
> > If you wanted to build up an array, you could write:
>
> >    @f = []
> >    for font in Magick.fonts
> >      @f << font.family
> >    end
>
> > But you can do this all in one line:
>
> >    @f = Magick.fonts.collect &:family
>
> > (I''m assuming you''re doing this in a Rails app. If
you''re doing it in
> > a standalone script, you would need to add "require
''active_support''"
> > for the &:family thingy to work)
>
> > This is equivalent to what ebeard showed, but uses some new sugar
> > Rails gives you. See
> >http://pragdave.pragprog.com/pragdave/2005/11/symbolto_proc.html. I
> > think this is going to be standard in Ruby 1.9.
>
> --
> Posted viahttp://www.ruby-forum.com/.

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Rajeev Kala

2007-Nov-07 16:44 UTC

head link

Re: Help on loop

I attempted your way but couldn''t get it to work. I came up with 
something like this:

<select name="font">
  <option value="">Select a font</option>
  <option value="">----------------------</option>

  <% @families = Magick.fonts.map{|f| f.family} %>
  <% for families in @families %>
  <option value="<%= families %>"><%= families
%></option>
  <% end %>
</select>

Seems to work fine so cant really complain.

Cheers


ebrad wrote:> Something like this maybe?
> 
> <%= select("SomeModel", "SomeAttribute", @f {|f| [ f
] }), :prompt =>
> "Select a font" %>
> 
> 
> On Nov 7, 11:06 am, Rajeev Kala
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
-- 
Posted via http://www.ruby-forum.com/.

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ghoti

2007-Nov-08 13:47 UTC

head link

Re: Help on loop

Guys ... put this in a helper ... littering your views with procedural
code. Will be difficult to maintain.

On Nov 7, 4:44 pm, Rajeev Kala
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:> I attempted your way but couldn''t get it to work. I came up with
> something like this:
>
> <select name="font">
>   <option value="">Select a font</option>
>   <option value="">----------------------</option>
>
>   <% @families = Magick.fonts.map{|f| f.family} %>
>   <% for families in @families %>
>   <option value="<%= families %>"><%= families
%></option>
>   <% end %>
> </select>
>
> Seems to work fine so cant really complain.
>
> Cheers
>
> ebrad wrote:
> > Something like this maybe?
>
> > <%= select("SomeModel", "SomeAttribute", @f
{|f| [ f ] }), :prompt =>
> > "Select a font" %>
>
> > On Nov 7, 11:06 am, Rajeev Kala
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
>
> --
> Posted viahttp://www.ruby-forum.com/.

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