diff options
5 files changed, 10 insertions, 51 deletions
diff --git a/activesupport/lib/active_support/core_ext/hash/compact.rb b/activesupport/lib/active_support/core_ext/hash/compact.rb index 28c8d86b9b..5cb858af5c 100644 --- a/activesupport/lib/active_support/core_ext/hash/compact.rb +++ b/activesupport/lib/active_support/core_ext/hash/compact.rb @@ -2,4 +2,4 @@ require "active_support/deprecation" -ActiveSupport::Deprecation.warn "Ruby 2.4+ (required by Rails 6) provides Hash#compact and Hash#compact! natively, so requiring active_support/core_ext/hash/compact is no longer necessary. Requiring it will raise LoadError in Rails 6.1." +ActiveSupport::Deprecation.warn "Ruby 2.5+ (required by Rails 6) provides Hash#compact and Hash#compact! natively, so requiring active_support/core_ext/hash/compact is no longer necessary. Requiring it will raise LoadError in Rails 6.1." diff --git a/activesupport/lib/active_support/core_ext/hash/transform_values.rb b/activesupport/lib/active_support/core_ext/hash/transform_values.rb index fc15130c9e..e4aeb0e891 100644 --- a/activesupport/lib/active_support/core_ext/hash/transform_values.rb +++ b/activesupport/lib/active_support/core_ext/hash/transform_values.rb @@ -2,4 +2,4 @@ require "active_support/deprecation" -ActiveSupport::Deprecation.warn "Ruby 2.4+ (required by Rails 6) provides Hash#transform_values natively, so requiring active_support/core_ext/hash/transform_values is no longer necessary. Requiring it will raise LoadError in Rails 6.1." +ActiveSupport::Deprecation.warn "Ruby 2.5+ (required by Rails 6) provides Hash#transform_values natively, so requiring active_support/core_ext/hash/transform_values is no longer necessary. Requiring it will raise LoadError in Rails 6.1." diff --git a/activesupport/lib/active_support/core_ext/numeric/inquiry.rb b/activesupport/lib/active_support/core_ext/numeric/inquiry.rb index e05e40825b..6b5240d051 100644 --- a/activesupport/lib/active_support/core_ext/numeric/inquiry.rb +++ b/activesupport/lib/active_support/core_ext/numeric/inquiry.rb @@ -2,4 +2,4 @@ require "active_support/deprecation" -ActiveSupport::Deprecation.warn "Ruby 2.4+ (required by Rails 6) provides Numeric#positive? and Numeric#negative? natively, so requiring active_support/core_ext/numeric/inquiry is no longer necessary. Requiring it will raise LoadError in Rails 6.1." +ActiveSupport::Deprecation.warn "Ruby 2.5+ (required by Rails 6) provides Numeric#positive? and Numeric#negative? natively, so requiring active_support/core_ext/numeric/inquiry is no longer necessary. Requiring it will raise LoadError in Rails 6.1." diff --git a/activesupport/test/core_ext/hash_ext_test.rb b/activesupport/test/core_ext/hash_ext_test.rb index afbc90f6d7..95fdcb8faf 100644 --- a/activesupport/test/core_ext/hash_ext_test.rb +++ b/activesupport/test/core_ext/hash_ext_test.rb @@ -310,30 +310,16 @@ class HashExtTest < ActiveSupport::TestCase assert_equal expected, merged end - def test_slice - original = { a: "x", b: "y", c: 10 } - expected = { a: "x", b: "y" } - - # Should return a new hash with only the given keys. - assert_equal expected, original.slice(:a, :b) - assert_not_equal expected, original - end - def test_slice_inplace original = { a: "x", b: "y", c: 10 } - expected = { c: 10 } + expected_return = { c: 10 } + expected_original = { a: "x", b: "y" } - # Should replace the hash with only the given keys. - assert_equal expected, original.slice!(:a, :b) - end + # Should return a hash containing the removed key/value pairs. + assert_equal expected_return, original.slice!(:a, :b) - def test_slice_with_an_array_key - original = { :a => "x", :b => "y", :c => 10, [:a, :b] => "an array key" } - expected = { [:a, :b] => "an array key", :c => 10 } - - # Should return a new hash with only the given keys when given an array key. - assert_equal expected, original.slice([:a, :b], :c) - assert_not_equal expected, original + # Should replace the hash with only the given keys. + assert_equal expected_original, original end def test_slice_inplace_with_an_array_key @@ -344,14 +330,6 @@ class HashExtTest < ActiveSupport::TestCase assert_equal expected, original.slice!([:a, :b], :c) end - def test_slice_with_splatted_keys - original = { :a => "x", :b => "y", :c => 10, [:a, :b] => "an array key" } - expected = { a: "x", b: "y" } - - # Should grab each of the splatted keys. - assert_equal expected, original.slice(*[:a, :b]) - end - def test_slice_bang_does_not_override_default hash = Hash.new(0) hash.update(a: 1, b: 2) diff --git a/guides/source/active_support_core_extensions.md b/guides/source/active_support_core_extensions.md index 428271d9b7..3db46bc42e 100644 --- a/guides/source/active_support_core_extensions.md +++ b/guides/source/active_support_core_extensions.md @@ -2729,26 +2729,7 @@ NOTE: Defined in `active_support/core_ext/hash/keys.rb`. ### Slicing -Ruby has built-in support for taking slices out of strings and arrays. Active Support extends slicing to hashes: - -```ruby -{a: 1, b: 2, c: 3}.slice(:a, :c) -# => {:a=>1, :c=>3} - -{a: 1, b: 2, c: 3}.slice(:b, :X) -# => {:b=>2} # non-existing keys are ignored -``` - -If the receiver responds to `convert_key` keys are normalized: - -```ruby -{a: 1, b: 2}.with_indifferent_access.slice("a") -# => {:a=>1} -``` - -NOTE. Slicing may come in handy for sanitizing option hashes with a white list of keys. - -There's also `slice!` which in addition to perform a slice in place returns what's removed: +The method `slice!` replaces the hash with only the given keys and returns a hash containing the removed key/value pairs. ```ruby hash = {a: 1, b: 2} |