Re: Re: ruby equivalent of isset()
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Mukto Mona
Mar 23, 2016, 1:39:02 AM3/23/16
to rubyonra...@googlegroups.com
Rick Olson wrote in post #29743:
>> The default value is nil, and thus false.
>>
>> if myvar
>> #some code
>> else
>> #default behaviour
>> end
>>
>> Works.
>
> That works with @instance vars, but not local vars. You'll get a
> NameError. You can do this, however:
>
> if defined?(my_var)
> #
> else
> #
> end
>
> --
> Rick Olson
> http://techno-weenie.net
Effective Answer
Mukto
--
Posted via http://www.ruby-forum.com/.
>> The default value is nil, and thus false.
>>
>> if myvar
>> #some code
>> else
>> #default behaviour
>> end
>>
>> Works.
>
> That works with @instance vars, but not local vars. You'll get a
> NameError. You can do this, however:
>
> if defined?(my_var)
> #
> else
> #
> end
>
> --
> Rick Olson
> http://techno-weenie.net
Effective Answer
Mukto
--
Posted via http://www.ruby-forum.com/.
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