Hwo to compare a number use in[a..b]

ruby-talk
1

dear all

----------<8-------------
------------1-----------
if A=13
   do something
else
   raise some warning
end
-------------2-----------
if A=14
  do something #(the same as 1 )
else
  raise some warning #(the same as 1)
end
------------8>----------------

so, is there other word like
if A is in[13..14]
else
  raise some warning #(the same as 1)
end

any help would be appropriated.

Edward

···

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

2

Hi,

Be careful not to mix up "=" (assignment) and "==".

You can either use the logical "or":

if A == 13 or A == 14
  ...

Or you can use Array#include:

if [13, 14].include? A
  ...

The latter doesn't really make sense here, but it's useful when you have
a lot of values.

In your specific case it might make more sense to put the error handling
on top:

raise ... unless A == 13 or A == 14
# do something

···

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

3

Thanks Jan, robert.
Regards
Edward.

···

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

4

And for integers we can also facilitate ranges

irb(main):001:0> (13..17).include? 15
=> true

Kind regards

robert

···

On Mon, Sep 3, 2012 at 1:47 PM, Jan E. <lists@ruby-forum.com> wrote:

You can either use the logical "or":

if A == 13 or A == 14
  ...

Or you can use Array#include:

if [13, 14].include? A
  ...

The latter doesn't really make sense here, but it's useful when you have
a lot of values.

--
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/