1 files changed, 10 insertions, 21 deletions
diff --git a/guides/source/active_record_validations.md b/guides/source/active_record_validations.md
index d076efcd54..3f13ef8d10 100644
--- a/guides/source/active_record_validations.md
+++ b/guides/source/active_record_validations.md
@@ -1,4 +1,4 @@
-**DO NOT READ THIS FILE ON GITHUB, GUIDES ARE PUBLISHED ON http://guides.rubyonrails.org.**
+**DO NOT READ THIS FILE ON GITHUB, GUIDES ARE PUBLISHED ON https://guides.rubyonrails.org.**
 
 Active Record Validations
 =========================
@@ -87,7 +87,7 @@ end
 We can see how it works by looking at some `rails console` output:
 
 ```ruby
-$ bin/rails console
+$ rails console
 >> p = Person.new(name: "John Doe")
 => #<Person id: nil, name: "John Doe", created_at: nil, updated_at: nil>
 >> p.new_record?
@@ -745,7 +745,7 @@ class Person < ApplicationRecord
 end
 ```
 
-The block receives the record, the attribute's name and the attribute's value.
+The block receives the record, the attribute's name, and the attribute's value.
 You can do anything you like to check for valid data within the block. If your
 validation fails, you should add an error message to the model, therefore
 making it invalid.
@@ -927,6 +927,13 @@ class Account < ApplicationRecord
 end
 ```
 
+As `Lambdas` are a type of `Proc`, they can also be used to write inline
+conditions in a shorter way.
+
+```ruby
+validates :password, confirmation: true, unless: -> { password.blank? }
+```
+
 ### Grouping Conditional validations
 
 Sometimes it is useful to have multiple validations use one condition. It can
@@ -1133,24 +1140,6 @@ person.errors.full_messages
  # => ["Name cannot contain the characters !@#%*()_-+="]
 ```
 
-An equivalent to `errors#add` is to use `<<` to append a message to the `errors.messages` array for an attribute:
-
-```ruby
-  class Person < ApplicationRecord
-    def a_method_used_for_validation_purposes
-      errors.messages[:name] << "cannot contain the characters !@#%*()_-+="
-    end
-  end
-
-  person = Person.create(name: "!@#")
-
-  person.errors[:name]
-   # => ["cannot contain the characters !@#%*()_-+="]
-
-  person.errors.to_a
-   # => ["Name cannot contain the characters !@#%*()_-+="]
-```
-
 ### `errors.details`
 
 You can specify a validator type to the returned error details hash using the