# 'and' keyword? **URL:** \ **Category:** Ruby\ **Created:** [December 4, 2008, 6:45am UTC](https://www.ruby-forum.com/t/and-keyword/154819 "2008-12-04T06:45:10Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![lstrecv](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/e68b1a/32.png) [@lstrecv](https://www.ruby-forum.com/u/lstrecv)\ **Post date:** [December 4, 2008, 6:45am UTC](https://www.ruby-forum.com/t/and-keyword/154819/1 "2008-12-04T06:45:10Z")
Because puts(“hi”) yields nil, the second item never gets called: puts “hi” and puts “bye” if true I can work around it with these: !puts “hi” and puts “bye” if true puts “hi”;puts “bye” if true [puts(“hi”), puts(“bye”)] if true –But was hoping there was a more aesthetic one liner out there that can use ‘and’… Thanks in advance!! ---
**Author:** ![lstrecv](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/e68b1a/32.png) [@lstrecv](https://www.ruby-forum.com/u/lstrecv)\ **Post date:** [December 4, 2008, 7:12am UTC](https://www.ruby-forum.com/t/and-keyword/154819/2 "2008-12-04T07:12:08Z")
On 04.12.2008, at 05:38 , list. rb wrote: > ‘and’… > > Thanks in advance!! How about puts “hi”, “bye” if true einarmagnus ---
**Author:** ![lstrecv](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/e68b1a/32.png) [@lstrecv](https://www.ruby-forum.com/u/lstrecv)\ **Post date:** [December 4, 2008, 7:47am UTC](https://www.ruby-forum.com/t/and-keyword/154819/3 "2008-12-04T07:47:53Z")
From: list. rb [[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)] # Because puts(“hi”) yields nil, the second item never # gets called: you can create your own puts/print that returns true or whatever ---
**Author:** ![lstrecv](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/e68b1a/32.png) [@lstrecv](https://www.ruby-forum.com/u/lstrecv)\ **Post date:** [December 4, 2008, 9:04am UTC](https://www.ruby-forum.com/t/and-keyword/154819/4 "2008-12-04T09:04:43Z")
List Rb wrote: > Because puts(“hi”) yields nil, the second item never gets called: > puts “hi” and puts “bye” if true > > I can work around it with these: > !puts “hi” and puts “bye” if true > puts “hi”;puts “bye” if true > [puts(“hi”), puts(“bye”)] if true > > –But was hoping there was a more aesthetic one liner out there that can > use > ‘and’… > > Thanks in advance!! In my opinion, using logical operators with side-effects is bad style. I’d try to avoid it. Regards Stefan ---
**Author:** ![lstrecv](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/e68b1a/32.png) [@lstrecv](https://www.ruby-forum.com/u/lstrecv)\ **Post date:** [December 4, 2008, 9:57am UTC](https://www.ruby-forum.com/t/and-keyword/154819/5 "2008-12-04T09:57:40Z")
List Rb wrote: > Because puts(“hi”) yields nil, the second item never gets called: > puts “hi” and puts “bye” if true I guess what you’re trying to compress is this: if true puts “hi” puts “bye” end If you really want a one-liner, then your best option is probably (puts “hi”; puts “bye”) if true (The parentheses ARE needed here. Otherwise puts “hi” is run always) If these are actually both calls to puts then you only need a single one: puts “hi”,“bye” if true Everything else gets yucky. For example, you can rely on the nil return value of puts: puts “hi” or puts “bye” if true puts(“hi”) || puts(“bye”) if true ---
**Author:** ![lstrecv](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/e68b1a/32.png) [@lstrecv](https://www.ruby-forum.com/u/lstrecv)\ **Post date:** [December 4, 2008, 11:01pm UTC](https://www.ruby-forum.com/t/and-keyword/154819/6 "2008-12-04T23:01:31Z")
On Dec 4, 2008, at 3:51 PM, “Robert D.” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > What about? > > puts %w{ hi bye } > > ## R. > > Ne baisse jamais la tête, tu ne verrais plus les étoiles. > > Robert D. 😉 In English, I woud say… jump and shout unless someone is sleeping. Ruby is so elegant that I fidng myself wanting to write similarly,. jump and shout unless someone.sleeping? ☹ Just wish it’s was interpreted as such ---
**Author:** ![lstrecv](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/e68b1a/32.png) [@lstrecv](https://www.ruby-forum.com/u/lstrecv)\ **Post date:** [December 4, 2008, 9:58pm UTC](https://www.ruby-forum.com/t/and-keyword/154819/7 "2008-12-04T21:58:29Z")
What about? puts %w{ hi bye } ## R. Ne baisse jamais la tête, tu ne verrais plus les étoiles. Robert D. 😉 ---
**Author:** ![lstrecv](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/e68b1a/32.png) [@lstrecv](https://www.ruby-forum.com/u/lstrecv)\ **Post date:** [December 4, 2008, 11:36pm UTC](https://www.ruby-forum.com/t/and-keyword/154819/8 "2008-12-04T23:36:09Z")
Hi – On Fri, 5 Dec 2008, List.rb wrote: > > Robert D. 😉 > > In English, I woud say… > > jump and shout unless someone is sleeping. > > Ruby is so elegant that I fidng myself wanting to write similarly,. > > jump and shout unless someone.sleeping? Ruby isn’t English, though. > ☹ > > Just wish it’s was interpreted as such It is; it’s just that puts returns nil, so it doesn’t pass through the and gate. I don’t think the word “and” just to mean “and then execute this” would be very useful. David ---
**Author:** ![lstrecv](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/e68b1a/32.png) [@lstrecv](https://www.ruby-forum.com/u/lstrecv)\ **Post date:** [December 5, 2008, 9:50am UTC](https://www.ruby-forum.com/t/and-keyword/154819/9 "2008-12-05T09:50:53Z")
On Thu, Dec 4, 2008 at 11:28 PM, David A. Black [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: I do not think highly of the following code in general, but if this is about some literal programming idea it might come in handy. Children just do not use it when home alone 😉 irb(main):010:0\> class Object irb(main):011:1\> def and &blk irb(main):012:2\> blk.call irb(main):013:2\> end irb(main):014:1\> end =\> nil irb(main):015:0\> puts( 42 ).and { puts 42 }.and { puts 42 } 42 42 42 Cheers R.