Using "if 3 in list_foo" for Python for Ruby

ruby-talk
1

There is no such thing as

  if 3 in [3, 2, 1]

construct in Ruby? so the common way in Ruby is

  if list1.include?(3)

or

  if list1.index(3)

is that right? is there an idiom in Ruby to do something like

  if 3.in([3,2,1])

or

  if 3.in [3,2,1]

···

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2

Hi --

There is no such thing as

if 3 in [3, 2, 1]

construct in Ruby? so the common way in Ruby is

if list1.include?(3)

or

if list1.index(3)

is that right? is there an idiom in Ruby to do something like

if 3.in([3,2,1])

or

if 3.in [3,2,1]

The include? way is the usual way. Hal Fulton at one point proposed an
in or in? method that would essentially be:

   class Object
     def in?(collection)
       collection.include?(self)
     end
   end

but I don't think it's on the radar for being added.

David

···

On Sun, 23 Sep 2007, SpringFlowers AutumnMoon wrote:

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3

David A. Black wrote:

···

On Sun, 23 Sep 2007, SpringFlowers AutumnMoon wrote:

if 3.in [3,2,1]

The include? way is the usual way. Hal Fulton at one point proposed an
in or in? method that would essentially be:

   class Object
     def in?(collection)
       collection.include?(self)
     end
   end

but I don't think it's on the radar for being added.

Hm... wouldn't that be handy...

i just sort of think that, if you ask me, "have you been to [Hawaii,
China, France]", i probably should be able to look at each one and tell
you an answer of yes or no, instead of asking [Hawaii, China, France] to
tell whether they have seen me.

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