If object is contained in an array logic - Ruby

Question

Conceptually I am trying to display a list of users in a search result list and have it say 'add as friend' if the user is not a friend and 'unfriend' if they are a friend.

The basic question I need answered to do this is how to say if an user ID exists in an array. I created a friends array which contains all the id numbers of my friends and need to essentially write;

if user_in_search_results_id = id in the array, unfriend, otherwise add as friend.

the 'if user_in_search_results_id = id anywhere in the array' is where i am stuck.

I have tried .where(user_in_search_results_id == @friends) and that did not work. @friends is friend array. I have also tried the .select method without luck.

Thanks

tigeravatar · Accepted Answer · 2013-08-16 22:12:55Z

2

I think you're looking for the include? method

user_in_search_results_id.each {|id| @friends.include?(id) ? unfriend(id) : add_as_friend(id)}

edited Aug 16, 2013 at 22:12

answered Aug 16, 2013 at 20:15

tigeravatar

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Arup Rakshit · Accepted Answer · 2013-08-16 20:09:22Z

0

The basic question I need answered to do this is how to say if an user ID exists in an array.

You can do

friends_array.member?(user_id) ? "unfriend" : "add friend"

answered Aug 16, 2013 at 20:09

Arup Rakshit

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squiguy · Accepted Answer · 2013-08-16 20:16:09Z

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I would use Enumerable#detect.

@friends.detect { |id| user_in_search_results_id == id }

answered Aug 16, 2013 at 20:16

squiguy

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