Feature #15323 » 0001-Adding-Enumerable-filter_map.patch
| enum.c | ||
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}
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static VALUE
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filter_map_i(RB_BLOCK_CALL_FUNC_ARGLIST(i, ary))
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{
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i = rb_yield_values2(argc, argv);
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if (RTEST(i)) {
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rb_ary_push(ary, i);
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}
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return Qnil;
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}
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/*
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* call-seq:
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* enum.filter_map { |obj| block } -> array
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* enum.filter_map -> an_enumerator
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*
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* Returns a new array containing the truthy results (everything except
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* +false+ or +nil+) of running the +block+ for every element in +enum+.
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*
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* If no block is given, an Enumerator is returned instead.
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*
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*
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* (1..10).filter_map { |i| i * 2 if i.even? } #=> [4, 8, 12, 16, 20]
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*
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*/
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static VALUE
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enum_filter_map(VALUE obj)
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{
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VALUE ary;
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RETURN_SIZED_ENUMERATOR(obj, 0, 0, enum_size);
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ary = rb_ary_new();
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rb_block_call(obj, id_each, 0, 0, filter_map_i, ary);
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return ary;
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}
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static VALUE
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reject_i(RB_BLOCK_CALL_FUNC_ARGLIST(i, ary))
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{
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ENUM_WANT_SVALUE();
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| ... | ... | |
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rb_define_method(rb_mEnumerable, "find_all", enum_find_all, 0);
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rb_define_method(rb_mEnumerable, "select", enum_find_all, 0);
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rb_define_method(rb_mEnumerable, "filter", enum_find_all, 0);
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rb_define_method(rb_mEnumerable, "filter_map", enum_filter_map, 0);
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rb_define_method(rb_mEnumerable, "reject", enum_reject, 0);
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rb_define_method(rb_mEnumerable, "collect", enum_collect, 0);
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rb_define_method(rb_mEnumerable, "map", enum_collect, 0);
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| spec/ruby/core/enumerable/filter_map_spec.rb | ||
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require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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ruby_version_is '2.7' do
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describe 'Enumerable#filter_map' do
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before :each do
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@numerous = EnumerableSpecs::Numerous.new(*(1..8).to_a)
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end
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it 'returns an empty array if there are no elements' do
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EnumerableSpecs::Empty.new.filter_map { true }.should == []
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end
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it 'returns an array with truthy results of passing each element to block' do
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@numerous.filter_map { |i| i * 2 if i.even? }.should == [4, 8, 12, 16]
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@numerous.filter_map { |i| i * 2 }.should == [2, 4, 6, 8, 10, 12, 14, 16]
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@numerous.filter_map { 0 }.should == [0, 0, 0, 0, 0, 0, 0, 0]
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@numerous.filter_map { false }.should == []
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@numerous.filter_map { nil }.should == []
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end
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it 'returns an enumerator when no block given' do
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@numerous.filter_map.should be_an_instance_of(Enumerator)
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end
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end
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end
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| test/ruby/test_enum.rb | ||
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end
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assert_equal [1, 2, 3, 4, 5], (1..5).sort_by{|e| klass.new e}
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end
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def test_filter_map
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@obj = (1..8).to_a
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assert_equal([4, 8, 12, 16], @obj.filter_map { |i| i * 2 if i.even? })
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assert_equal([2, 4, 6, 8, 10, 12, 14, 16], @obj.filter_map { |i| i * 2 })
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assert_equal([0, 0, 0, 0, 0, 0, 0, 0], @obj.filter_map { 0 })
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assert_equal([], @obj.filter_map { false })
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assert_equal([], @obj.filter_map { nil })
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assert_instance_of(Enumerator, @obj.filter_map)
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end
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end
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| test/ruby/test_enumerator.rb | ||
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def test_size_for_enum_created_from_enumerable
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%i[find_all reject map flat_map partition group_by sort_by min_by max_by
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minmax_by each_with_index reverse_each each_entry].each do |method|
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minmax_by each_with_index reverse_each each_entry filter_map].each do |method|
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assert_equal nil, @obj.send(method).size
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assert_equal 42, @sized.send(method).size
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end
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