Hi all

irb(main):001:0> "" || "asdf"
=> ""
irb(main):002:0> nil || "asdf"
=> "asdf"
irb(main):003:0>

I'd like the first one to also return "asdf". So is there an operator
that fits my needs? :-)

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

"" or "asdf"
nil or "asdf"


On Nov 6, 2007, at 7:41 PM, Joshua Muheim wrote:

> Hi all
>
> irb(main):001:0> "" || "asdf"
> => ""
> irb(main):002:0> nil || "asdf"
> => "asdf"
> irb(main):003:0>
>
> I'd like the first one to also return "asdf". So is there an operator
> that fits my needs? :-)
>
> Thanks
> Josh
> --
> Posted via http://www.ruby-forum.com/.
>

actually, that doesn't work. sorry.

On Nov 6, 2007, at 8:10 PM, Pradeep Elankumaran wrote:

> "" or "asdf"
> nil or "asdf"
>
>
> On Nov 6, 2007, at 7:41 PM, Joshua Muheim wrote:
>
>> Hi all
>>
>> irb(main):001:0> "" || "asdf"
>> => ""
>> irb(main):002:0> nil || "asdf"
>> => "asdf"
>> irb(main):003:0>
>>
>> I'd like the first one to also return "asdf". So is there an operator
>> that fits my needs? :-)
>>
>> Thanks
>> Josh
>> --
>> Posted via http://www.ruby-forum.com/.
>>
>

Joshua Muheim wrote:
> Hi all
>
> irb(main):001:0> "" || "asdf"
> => ""
> irb(main):002:0> nil || "asdf"
> => "asdf"
> irb(main):003:0>
>
> I'd like the first one to also return "asdf". So is there an operator
> that fits my needs? :-)
>
> Thanks
> Josh

I guess you could do something cool like

class String

def |(str)
return str if self.eql?("")
end

end





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

Konrad Meyer wrote:
> Quoth Joshua Muheim:
>>
>> Thanks
>> Josh
>
> irb(main):001:0> str = ""
> => ""
> irb(main):002:0> str != "" || "asdf"
> => "asdf"
> irb(main):003:0> nil || "asdf"
> => "asdf"
>
> HTH,

The problem is, in my Rails app I sometimes have a variable set to ""
(empty user input) or nil.

<%= "The variable is #{(var || "empty")}" %>

With your version I won't get "empty" when the var is nil:

<%= "The variable is #{(var != "" || "empty")}" %>

var = nil
=> The variable is # nothing here...
var = "asdf"
=> The variable is asdf
--
Posted via http://www.ruby-forum.com/.

On Nov 6, 6:41 pm, Joshua Muheim <fo...@josh.ch> wrote:
> Hi all
>
> irb(main):001:0> "" || "asdf"
> => ""
> irb(main):002:0> nil || "asdf"
> => "asdf"
> irb(main):003:0>
>
> I'd like the first one to also return "asdf". So is there an operator
> that fits my needs? :-)

"" isn't false so || and or won't work. You'll have to code it
differently. E.g.:

a = "a string"
a || (a.empty? ? "asdf" : a)

On 11/6/07, yermej <yermej@gmail.com> wrote:
> On Nov 6, 6:41 pm, Joshua Muheim <fo...@josh.ch> wrote:
> > Hi all
> >
> > irb(main):001:0> "" || "asdf"
> > => ""
> > irb(main):002:0> nil || "asdf"
> > => "asdf"
> > irb(main):003:0>
> >
> > I'd like the first one to also return "asdf". So is there an operator
> > that fits my needs? :-)
>
> "" isn't false so || and or won't work. You'll have to code it
> differently. E.g.:
>
> a = "a string"
> a || (a.empty? ? "asdf" : a)

This doesn't work for me. The previous one doesn't either. This one
does (I'm sure someone could easily clean this up, I feel lazy
though)...

[nil, "", "something"].each do |i|
puts( (item ||= "").empty? ? "asdf" : item )
end

That results in...

asdf
asdf
something

Todd

On 11/6/07, Todd Benson <caduceass@gmail.com> wrote:
> On 11/6/07, yermej <yermej@gmail.com> wrote:
> > On Nov 6, 6:41 pm, Joshua Muheim <fo...@josh.ch> wrote:
> > > Hi all
> > >
> > > irb(main):001:0> "" || "asdf"
> > > => ""
> > > irb(main):002:0> nil || "asdf"
> > > => "asdf"
> > > irb(main):003:0>
> > >
> > > I'd like the first one to also return "asdf". So is there an operator
> > > that fits my needs? :-)
> >
> > "" isn't false so || and or won't work. You'll have to code it
> > differently. E.g.:
> >
> > a = "a string"
> > a || (a.empty? ? "asdf" : a)
>
> This doesn't work for me. The previous one doesn't either. This one
> does (I'm sure someone could easily clean this up, I feel lazy
> though)...
>
> [nil, "", "something"].each do |i|
> puts( (item ||= "").empty? ? "asdf" : item )

There should be an additional closing ) on the previous line of code

> end

Todd