CODEWITHSUNDEEP
ruby-on-railsarraysruby
Godzilla74
Godzilla74

Reputation: 2502

How to iterate over two arrays and delete matching values

I'm trying to iterate over two arrays in my Ruby on Rails program and create a new array with the objects that shouldn't be excluded.

Here is my object array that I need to iterate over:

[#<Result id: 1437, network_host_test_id: 1320, issue_id: 50231, created_at: "2016-04-14 19:30:22", updated_at: "2016-04-27 18:08:00", deleted_at: nil>,
 #<Result id: 1438, network_host_test_id: 1320, issue_id: 47573, created_at: "2016-04-14 19:30:22", updated_at: "2016-04-14 19:30:22", deleted_at: nil>,
 #<Result id: 1439, network_host_test_id: 1320, issue_id: 39758, created_at: "2016-04-14 19:30:22", updated_at: "2016-04-14 19:30:22", deleted_at: nil>,
 #<Result id: 1441, network_host_test_id: 1320, issue_id: 47574, created_at: "2016-04-14 19:30:22", updated_at: "2016-04-14 19:30:22", deleted_at: nil>,
 #<Result id: 1442, network_host_test_id: 1320, issue_id: 50442, created_at: "2016-04-14 19:30:22", updated_at: "2016-04-14 19:30:22", deleted_at: nil>,
 #<Result id: 1443, network_host_test_id: 1320, issue_id: 40991, created_at: "2016-04-14 19:30:22", updated_at: "2016-04-14 19:30:22", deleted_at: nil>,
 #<Result id: 1444, network_host_test_id: 1320, issue_id: 43896, created_at: "2016-04-14 19:30:22", updated_at: "2016-04-14 19:30:22", deleted_at: nil>]

My exclude array is:

[#<DeferredIssue id: 1, defer_reason: "Test for issue", defer_name: "JF", issue_id: 50231, created_at: "2016-04-28 17:50:37", updated_at: "2016-04-28 17:50:37", network_host_id: 76>,
 #<DeferredIssue id: 2, defer_reason: "Defer a 10", defer_name: "Travis", issue_id: 43896, created_at: "2016-04-28 17:51:25", updated_at: "2016-04-28 17:51:25", network_host_id: 76>]

In the end, my array should not have objects with the issue_id of 50231 or 43896.

I tested this out initially using exclude?, but my exclude array was just [50231, 43896]. Now that they are objects, that type of iteration doesn't work.

What is the Ruby way to do this type of thing?

Upvotes: 0

Views: 100

Answers (1)

Ilya
Ilya

Reputation: 13477

You can transform your array to an array of issue_ids with map:

ids = exclude_array.map(&:issue_id)
#=> [50231, 43896]
your_objects.select {|o| ids.exclude?(o.issue_id) }

Upvotes: 4

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