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ddd155842f
* enumerator.c: Enumerator::Lazy#slice_after implemented. Requested by Tsuyoshi Sawada. [ruby-core:58123] [Feature #9071] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45981 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
660 lines
18 KiB
Ruby
660 lines
18 KiB
Ruby
require 'test/unit'
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require 'continuation'
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require 'stringio'
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class TestEnumerable < Test::Unit::TestCase
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def setup
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@obj = Object.new
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class << @obj
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include Enumerable
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def each
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yield 1
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yield 2
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yield 3
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yield 1
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yield 2
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self
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end
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end
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@empty = Object.new
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class << @empty
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attr_reader :block
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include Enumerable
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def each(&block)
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@block = block
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self
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end
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end
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@verbose = $VERBOSE
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$VERBOSE = nil
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end
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def teardown
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$VERBOSE = @verbose
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end
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def assert_not_warn
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begin
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org_stderr = $stderr
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v = $VERBOSE
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$stderr = StringIO.new(warn = '')
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$VERBOSE = true
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yield
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ensure
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$stderr = org_stderr
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$VERBOSE = v
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end
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assert_equal("", warn)
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end
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def test_grep
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assert_equal([1, 2, 1, 2], @obj.grep(1..2))
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a = []
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@obj.grep(2) {|x| a << x }
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assert_equal([2, 2], a)
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bug5801 = '[ruby-dev:45041]'
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@empty.grep(//)
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assert_nothing_raised(bug5801) {100.times {@empty.block.call}}
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a = []
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lambda = ->(x, i) {a << [x, i]}
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@obj.each_with_index.grep(proc{|x,i|x==2}, &lambda)
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assert_equal([[2, 1], [2, 4]], a)
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end
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def test_count
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assert_equal(5, @obj.count)
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assert_equal(2, @obj.count(1))
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assert_equal(3, @obj.count {|x| x % 2 == 1 })
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assert_equal(2, @obj.count(1) {|x| x % 2 == 1 })
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assert_raise(ArgumentError) { @obj.count(0, 1) }
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if RUBY_ENGINE == "ruby"
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en = Class.new {
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include Enumerable
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alias :size :count
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def each
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yield 1
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end
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}
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assert_equal(1, en.new.count, '[ruby-core:24794]')
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end
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end
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def test_find
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assert_equal(2, @obj.find {|x| x % 2 == 0 })
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assert_equal(nil, @obj.find {|x| false })
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assert_equal(:foo, @obj.find(proc { :foo }) {|x| false })
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cond = ->(x, i) { x % 2 == 0 }
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assert_equal([2, 1], @obj.each_with_index.find(&cond))
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end
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def test_find_index
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assert_equal(1, @obj.find_index(2))
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assert_equal(1, @obj.find_index {|x| x % 2 == 0 })
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assert_equal(nil, @obj.find_index {|x| false })
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assert_raise(ArgumentError) { @obj.find_index(0, 1) }
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assert_equal(1, @obj.find_index(2) {|x| x == 1 })
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end
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def test_find_all
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assert_equal([1, 3, 1], @obj.find_all {|x| x % 2 == 1 })
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cond = ->(x, i) { x % 2 == 1 }
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assert_equal([[1, 0], [3, 2], [1, 3]], @obj.each_with_index.find_all(&cond))
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end
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def test_reject
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assert_equal([2, 3, 2], @obj.reject {|x| x < 2 })
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cond = ->(x, i) {x < 2}
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assert_equal([[2, 1], [3, 2], [2, 4]], @obj.each_with_index.reject(&cond))
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end
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def test_to_a
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assert_equal([1, 2, 3, 1, 2], @obj.to_a)
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end
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def test_to_h
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obj = Object.new
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def obj.each(*args)
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yield(*args)
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yield [:key, :value]
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yield :other_key, :other_value
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kvp = Object.new
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def kvp.to_ary
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[:obtained, :via_to_ary]
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end
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yield kvp
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end
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obj.extend Enumerable
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assert_equal({
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:hello => :world,
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:key => :value,
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:other_key => :other_value,
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:obtained => :via_to_ary,
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}, obj.to_h(:hello, :world))
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e = assert_raise(TypeError) {
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obj.to_h(:not_an_array)
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}
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assert_equal "wrong element type Symbol (expected array)", e.message
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e = assert_raise(ArgumentError) {
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obj.to_h([1])
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}
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assert_equal "element has wrong array length (expected 2, was 1)", e.message
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end
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def test_inject
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assert_equal(12, @obj.inject {|z, x| z * x })
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assert_equal(48, @obj.inject {|z, x| z * 2 + x })
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assert_equal(12, @obj.inject(:*))
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assert_equal(24, @obj.inject(2) {|z, x| z * x })
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assert_equal(24, @obj.inject(2, :*) {|z, x| z * x })
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end
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def test_partition
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assert_equal([[1, 3, 1], [2, 2]], @obj.partition {|x| x % 2 == 1 })
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cond = ->(x, i) { x % 2 == 1 }
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assert_equal([[[1, 0], [3, 2], [1, 3]], [[2, 1], [2, 4]]], @obj.each_with_index.partition(&cond))
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end
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def test_group_by
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h = { 1 => [1, 1], 2 => [2, 2], 3 => [3] }
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assert_equal(h, @obj.group_by {|x| x })
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h = {1=>[[1, 0], [1, 3]], 2=>[[2, 1], [2, 4]], 3=>[[3, 2]]}
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cond = ->(x, i) { x }
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assert_equal(h, @obj.each_with_index.group_by(&cond))
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end
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def test_first
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assert_equal(1, @obj.first)
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assert_equal([1, 2, 3], @obj.first(3))
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assert_nil(@empty.first)
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end
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def test_sort
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assert_equal([1, 1, 2, 2, 3], @obj.sort)
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end
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def test_sort_by
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assert_equal([3, 2, 2, 1, 1], @obj.sort_by {|x| -x })
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assert_equal((1..300).to_a.reverse, (1..300).sort_by {|x| -x })
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cond = ->(x, i) { [-x, i] }
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assert_equal([[3, 2], [2, 1], [2, 4], [1, 0], [1, 3]], @obj.each_with_index.sort_by(&cond))
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end
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def test_all
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assert_equal(true, @obj.all? {|x| x <= 3 })
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assert_equal(false, @obj.all? {|x| x < 3 })
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assert_equal(true, @obj.all?)
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assert_equal(false, [true, true, false].all?)
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end
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def test_any
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assert_equal(true, @obj.any? {|x| x >= 3 })
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assert_equal(false, @obj.any? {|x| x > 3 })
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assert_equal(true, @obj.any?)
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assert_equal(false, [false, false, false].any?)
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end
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def test_one
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assert(@obj.one? {|x| x == 3 })
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assert(!(@obj.one? {|x| x == 1 }))
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assert(!(@obj.one? {|x| x == 4 }))
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assert(%w{ant bear cat}.one? {|word| word.length == 4})
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assert(!(%w{ant bear cat}.one? {|word| word.length > 4}))
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assert(!(%w{ant bear cat}.one? {|word| word.length < 4}))
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assert(!([ nil, true, 99 ].one?))
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assert([ nil, true, false ].one?)
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end
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def test_none
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assert(@obj.none? {|x| x == 4 })
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assert(!(@obj.none? {|x| x == 1 }))
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assert(!(@obj.none? {|x| x == 3 }))
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assert(%w{ant bear cat}.none? {|word| word.length == 5})
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assert(!(%w{ant bear cat}.none? {|word| word.length >= 4}))
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assert([].none?)
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assert([nil].none?)
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assert([nil,false].none?)
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end
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def test_min
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assert_equal(1, @obj.min)
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assert_equal(3, @obj.min {|a,b| b <=> a })
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cond = ->((a, ia), (b, ib)) { (b <=> a).nonzero? or ia <=> ib }
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assert_equal([3, 2], @obj.each_with_index.min(&cond))
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ary = %w(albatross dog horse)
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assert_equal("albatross", ary.min)
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assert_equal("dog", ary.min {|a,b| a.length <=> b.length })
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assert_equal(1, [3,2,1].min)
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assert_equal(%w[albatross dog], ary.min(2))
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assert_equal(%w[dog horse],
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ary.min(2) {|a,b| a.length <=> b.length })
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end
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def test_max
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assert_equal(3, @obj.max)
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assert_equal(1, @obj.max {|a,b| b <=> a })
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cond = ->((a, ia), (b, ib)) { (b <=> a).nonzero? or ia <=> ib }
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assert_equal([1, 3], @obj.each_with_index.max(&cond))
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ary = %w(albatross dog horse)
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assert_equal("horse", ary.max)
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assert_equal("albatross", ary.max {|a,b| a.length <=> b.length })
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assert_equal(1, [3,2,1].max{|a,b| b <=> a })
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assert_equal(%w[dog horse], ary.max(2))
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assert_equal(%w[horse albatross],
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ary.max(2) {|a,b| a.length <=> b.length })
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end
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def test_minmax
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assert_equal([1, 3], @obj.minmax)
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assert_equal([3, 1], @obj.minmax {|a,b| b <=> a })
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ary = %w(albatross dog horse)
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assert_equal(["albatross", "horse"], ary.minmax)
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assert_equal(["dog", "albatross"], ary.minmax {|a,b| a.length <=> b.length })
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assert_equal([1, 3], [2,3,1].minmax)
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assert_equal([3, 1], [2,3,1].minmax {|a,b| b <=> a })
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assert_equal([1, 3], [2,2,3,3,1,1].minmax)
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end
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def test_min_by
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assert_equal(3, @obj.min_by {|x| -x })
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cond = ->(x, i) { -x }
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assert_equal([3, 2], @obj.each_with_index.min_by(&cond))
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a = %w(albatross dog horse)
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assert_equal("dog", a.min_by {|x| x.length })
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assert_equal(3, [2,3,1].min_by {|x| -x })
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assert_equal(%w[dog horse], a.min_by(2) {|x| x.length })
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end
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def test_max_by
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assert_equal(1, @obj.max_by {|x| -x })
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cond = ->(x, i) { -x }
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assert_equal([1, 0], @obj.each_with_index.max_by(&cond))
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a = %w(albatross dog horse)
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assert_equal("albatross", a.max_by {|x| x.length })
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assert_equal(1, [2,3,1].max_by {|x| -x })
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assert_equal(%w[horse albatross], a.max_by(2) {|x| x.length })
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end
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def test_minmax_by
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assert_equal([3, 1], @obj.minmax_by {|x| -x })
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cond = ->(x, i) { -x }
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assert_equal([[3, 2], [1, 0]], @obj.each_with_index.minmax_by(&cond))
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a = %w(albatross dog horse)
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assert_equal(["dog", "albatross"], a.minmax_by {|x| x.length })
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assert_equal([3, 1], [2,3,1].minmax_by {|x| -x })
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end
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def test_member
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assert(@obj.member?(1))
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assert(!(@obj.member?(4)))
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assert([1,2,3].member?(1))
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assert(!([1,2,3].member?(4)))
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end
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class Foo
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include Enumerable
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def each
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yield 1
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yield 1,2
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end
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end
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def test_each_with_index
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a = []
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@obj.each_with_index {|x, i| a << [x, i] }
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assert_equal([[1,0],[2,1],[3,2],[1,3],[2,4]], a)
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hash = Hash.new
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%w(cat dog wombat).each_with_index do |item, index|
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hash[item] = index
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end
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assert_equal({"cat"=>0, "wombat"=>2, "dog"=>1}, hash)
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assert_equal([[1, 0], [[1, 2], 1]], Foo.new.each_with_index.to_a)
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end
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def test_each_with_object
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obj = [0, 1]
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ret = (1..10).each_with_object(obj) {|i, memo|
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memo[0] += i
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memo[1] *= i
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}
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assert_same(obj, ret)
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assert_equal([55, 3628800], ret)
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assert_equal([[1, nil], [[1, 2], nil]], Foo.new.each_with_object(nil).to_a)
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end
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def test_each_entry
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assert_equal([1, 2, 3], [1, 2, 3].each_entry.to_a)
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assert_equal([1, [1, 2]], Foo.new.each_entry.to_a)
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a = []
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cond = ->(x, i) { a << x }
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@obj.each_with_index.each_entry(&cond)
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assert_equal([1, 2, 3, 1, 2], a)
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end
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def test_each_slice
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ary = []
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(1..10).each_slice(3) {|a| ary << a}
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assert_equal([[1, 2, 3], [4, 5, 6], [7, 8, 9], [10]], ary)
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bug9749 = '[ruby-core:62060] [Bug #9749]'
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ary.clear
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(1..10).each_slice(3, &lambda {|a, *| ary << a})
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assert_equal([[1, 2, 3], [4, 5, 6], [7, 8, 9], [10]], ary, bug9749)
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end
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def test_each_cons
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ary = []
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(1..5).each_cons(3) {|a| ary << a}
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assert_equal([[1, 2, 3], [2, 3, 4], [3, 4, 5]], ary)
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bug9749 = '[ruby-core:62060] [Bug #9749]'
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ary.clear
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(1..5).each_cons(3, &lambda {|a, *| ary << a})
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assert_equal([[1, 2, 3], [2, 3, 4], [3, 4, 5]], ary, bug9749)
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end
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def test_zip
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assert_equal([[1,1],[2,2],[3,3],[1,1],[2,2]], @obj.zip(@obj))
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a = []
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@obj.zip([:a, :b, :c]) {|x,y| a << [x, y] }
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assert_equal([[1,:a],[2,:b],[3,:c],[1,nil],[2,nil]], a)
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a = []
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cond = ->((x, i), y) { a << [x, y, i] }
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@obj.each_with_index.zip([:a, :b, :c], &cond)
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assert_equal([[1,:a,0],[2,:b,1],[3,:c,2],[1,nil,3],[2,nil,4]], a)
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a = []
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@obj.zip({a: "A", b: "B", c: "C"}) {|x,y| a << [x, y] }
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assert_equal([[1,[:a,"A"]],[2,[:b,"B"]],[3,[:c,"C"]],[1,nil],[2,nil]], a)
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ary = Object.new
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def ary.to_a; [1, 2]; end
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assert_raise(TypeError) {%w(a b).zip(ary)}
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def ary.each; [3, 4].each{|e|yield e}; end
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assert_equal([[1, 3], [2, 4], [3, nil], [1, nil], [2, nil]], @obj.zip(ary))
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def ary.to_ary; [5, 6]; end
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assert_equal([[1, 5], [2, 6], [3, nil], [1, nil], [2, nil]], @obj.zip(ary))
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end
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def test_take
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assert_equal([1,2,3], @obj.take(3))
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end
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def test_take_while
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assert_equal([1,2], @obj.take_while {|x| x <= 2})
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cond = ->(x, i) {x <= 2}
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assert_equal([[1, 0], [2, 1]], @obj.each_with_index.take_while(&cond))
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bug5801 = '[ruby-dev:45040]'
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@empty.take_while {true}
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assert_nothing_raised(bug5801) {100.times {@empty.block.call}}
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end
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def test_drop
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assert_equal([3,1,2], @obj.drop(2))
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end
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def test_drop_while
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assert_equal([3,1,2], @obj.drop_while {|x| x <= 2})
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cond = ->(x, i) {x <= 2}
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assert_equal([[3, 2], [1, 3], [2, 4]], @obj.each_with_index.drop_while(&cond))
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end
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def test_cycle
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assert_equal([1,2,3,1,2,1,2,3,1,2], @obj.cycle.take(10))
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a = []
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@obj.cycle(2) {|x| a << x}
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assert_equal([1,2,3,1,2,1,2,3,1,2], a)
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a = []
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cond = ->(x, i) {a << x}
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@obj.each_with_index.cycle(2, &cond)
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assert_equal([1,2,3,1,2,1,2,3,1,2], a)
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end
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def test_callcc
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assert_raise(RuntimeError) do
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c = nil
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@obj.sort_by {|x| callcc {|c2| c ||= c2 }; x }
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c.call
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end
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assert_raise(RuntimeError) do
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c = nil
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o = Object.new
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class << o; self; end.class_eval do
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define_method(:<=>) do |x|
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callcc {|c2| c ||= c2 }
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0
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end
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end
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[o, o].sort_by {|x| x }
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c.call
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end
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assert_raise(RuntimeError) do
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c = nil
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o = Object.new
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class << o; self; end.class_eval do
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define_method(:<=>) do |x|
|
|
callcc {|c2| c ||= c2 }
|
|
0
|
|
end
|
|
end
|
|
[o, o, o].sort_by {|x| x }
|
|
c.call
|
|
end
|
|
end
|
|
|
|
def test_reverse_each
|
|
assert_equal([2,1,3,2,1], @obj.reverse_each.to_a)
|
|
end
|
|
|
|
def test_chunk
|
|
e = [].chunk {|elt| true }
|
|
assert_equal([], e.to_a)
|
|
|
|
e = @obj.chunk {|elt| elt & 2 == 0 ? false : true }
|
|
assert_equal([[false, [1]], [true, [2, 3]], [false, [1]], [true, [2]]], e.to_a)
|
|
|
|
e = @obj.chunk(acc: 0) {|elt, h| h[:acc] += elt; h[:acc].even? }
|
|
assert_equal([[false, [1,2]], [true, [3]], [false, [1,2]]], e.to_a)
|
|
assert_equal([[false, [1,2]], [true, [3]], [false, [1,2]]], e.to_a) # this tests h is duplicated.
|
|
|
|
hs = [{}]
|
|
e = [:foo].chunk(hs[0]) {|elt, h|
|
|
hs << h
|
|
true
|
|
}
|
|
assert_equal([[true, [:foo]]], e.to_a)
|
|
assert_equal([[true, [:foo]]], e.to_a)
|
|
assert_equal([{}, {}, {}], hs)
|
|
assert_not_same(hs[0], hs[1])
|
|
assert_not_same(hs[0], hs[2])
|
|
assert_not_same(hs[1], hs[2])
|
|
|
|
e = @obj.chunk {|elt| elt < 3 ? :_alone : true }
|
|
assert_equal([[:_alone, [1]],
|
|
[:_alone, [2]],
|
|
[true, [3]],
|
|
[:_alone, [1]],
|
|
[:_alone, [2]]], e.to_a)
|
|
|
|
e = @obj.chunk {|elt| elt == 3 ? :_separator : true }
|
|
assert_equal([[true, [1, 2]],
|
|
[true, [1, 2]]], e.to_a)
|
|
|
|
e = @obj.chunk {|elt| elt == 3 ? nil : true }
|
|
assert_equal([[true, [1, 2]],
|
|
[true, [1, 2]]], e.to_a)
|
|
|
|
e = @obj.chunk {|elt| :_foo }
|
|
assert_raise(RuntimeError) { e.to_a }
|
|
end
|
|
|
|
def test_slice_before
|
|
e = [].slice_before {|elt| true }
|
|
assert_equal([], e.to_a)
|
|
|
|
e = @obj.slice_before {|elt| elt.even? }
|
|
assert_equal([[1], [2,3,1], [2]], e.to_a)
|
|
|
|
e = @obj.slice_before {|elt| elt.odd? }
|
|
assert_equal([[1,2], [3], [1,2]], e.to_a)
|
|
|
|
e = @obj.slice_before(acc: 0) {|elt, h| h[:acc] += elt; h[:acc].even? }
|
|
assert_equal([[1,2], [3,1,2]], e.to_a)
|
|
assert_equal([[1,2], [3,1,2]], e.to_a) # this tests h is duplicated.
|
|
|
|
hs = [{}]
|
|
e = [:foo].slice_before(hs[0]) {|elt, h|
|
|
hs << h
|
|
true
|
|
}
|
|
assert_equal([[:foo]], e.to_a)
|
|
assert_equal([[:foo]], e.to_a)
|
|
assert_equal([{}, {}, {}], hs)
|
|
assert_not_same(hs[0], hs[1])
|
|
assert_not_same(hs[0], hs[2])
|
|
assert_not_same(hs[1], hs[2])
|
|
|
|
ss = %w[abc defg h ijk l mno pqr st u vw xy z]
|
|
assert_equal([%w[abc defg h], %w[ijk l], %w[mno], %w[pqr st u vw xy z]],
|
|
ss.slice_before(/\A...\z/).to_a)
|
|
assert_not_warn{ss.slice_before(/\A...\z/).to_a}
|
|
end
|
|
|
|
def test_slice_after0
|
|
assert_raise(ArgumentError) { [].slice_after }
|
|
end
|
|
|
|
def test_slice_after1
|
|
e = [].slice_after {|a| flunk "should not be called" }
|
|
assert_equal([], e.to_a)
|
|
|
|
e = [1,2].slice_after(1)
|
|
assert_equal([[1], [2]], e.to_a)
|
|
|
|
e = [1,2].slice_after(3)
|
|
assert_equal([[1, 2]], e.to_a)
|
|
|
|
[true, false].each {|b|
|
|
block_results = [true, b]
|
|
e = [1,2].slice_after {|a| block_results.shift }
|
|
assert_equal([[1], [2]], e.to_a)
|
|
assert_equal([], block_results)
|
|
|
|
block_results = [false, b]
|
|
e = [1,2].slice_after {|a| block_results.shift }
|
|
assert_equal([[1, 2]], e.to_a)
|
|
assert_equal([], block_results)
|
|
}
|
|
end
|
|
|
|
def test_slice_after_both_pattern_and_block
|
|
assert_raise(ArgumentError) { [].slice_after(1) {|a| true } }
|
|
end
|
|
|
|
def test_slice_after_continuation_lines
|
|
lines = ["foo\n", "bar\\\n", "baz\n", "\n", "qux\n"]
|
|
e = lines.slice_after(/[^\\]\n\z/)
|
|
assert_equal([["foo\n"], ["bar\\\n", "baz\n"], ["\n", "qux\n"]], e.to_a)
|
|
end
|
|
|
|
def test_slice_before_empty_line
|
|
lines = ["foo", "", "bar"]
|
|
e = lines.slice_after(/\A\s*\z/)
|
|
assert_equal([["foo", ""], ["bar"]], e.to_a)
|
|
end
|
|
|
|
def test_detect
|
|
@obj = ('a'..'z')
|
|
assert_equal('c', @obj.detect {|x| x == 'c' })
|
|
|
|
proc = Proc.new {|x| x == 'c' }
|
|
assert_equal('c', @obj.detect(&proc))
|
|
|
|
lambda = ->(x) { x == 'c' }
|
|
assert_equal('c', @obj.detect(&lambda))
|
|
|
|
assert_equal(['c',2], @obj.each_with_index.detect {|x, i| x == 'c' })
|
|
|
|
proc2 = Proc.new {|x, i| x == 'c' }
|
|
assert_equal(['c',2], @obj.each_with_index.detect(&proc2))
|
|
|
|
bug9605 = '[ruby-core:61340]'
|
|
lambda2 = ->(x, i) { x == 'c' }
|
|
assert_equal(['c',2], @obj.each_with_index.detect(&lambda2))
|
|
end
|
|
|
|
def test_select
|
|
@obj = ('a'..'z')
|
|
assert_equal(['c'], @obj.select {|x| x == 'c' })
|
|
|
|
proc = Proc.new {|x| x == 'c' }
|
|
assert_equal(['c'], @obj.select(&proc))
|
|
|
|
lambda = ->(x) { x == 'c' }
|
|
assert_equal(['c'], @obj.select(&lambda))
|
|
|
|
assert_equal([['c',2]], @obj.each_with_index.select {|x, i| x == 'c' })
|
|
|
|
proc2 = Proc.new {|x, i| x == 'c' }
|
|
assert_equal([['c',2]], @obj.each_with_index.select(&proc2))
|
|
|
|
bug9605 = '[ruby-core:61340]'
|
|
lambda2 = ->(x, i) { x == 'c' }
|
|
assert_equal([['c',2]], @obj.each_with_index.select(&lambda2))
|
|
end
|
|
|
|
def test_map
|
|
@obj = ('a'..'e')
|
|
assert_equal(['A', 'B', 'C', 'D', 'E'], @obj.map {|x| x.upcase })
|
|
|
|
proc = Proc.new {|x| x.upcase }
|
|
assert_equal(['A', 'B', 'C', 'D', 'E'], @obj.map(&proc))
|
|
|
|
lambda = ->(x) { x.upcase }
|
|
assert_equal(['A', 'B', 'C', 'D', 'E'], @obj.map(&lambda))
|
|
|
|
assert_equal([['A',0], ['B',1], ['C',2], ['D',3], ['E',4]],
|
|
@obj.each_with_index.map {|x, i| [x.upcase, i] })
|
|
|
|
proc2 = Proc.new {|x, i| [x.upcase, i] }
|
|
assert_equal([['A',0], ['B',1], ['C',2], ['D',3], ['E',4]],
|
|
@obj.each_with_index.map(&proc2))
|
|
|
|
lambda2 = ->(x, i) { [x.upcase, i] }
|
|
assert_equal([['A',0], ['B',1], ['C',2], ['D',3], ['E',4]],
|
|
@obj.each_with_index.map(&lambda2))
|
|
end
|
|
|
|
def test_flat_map
|
|
@obj = [[1,2], [3,4]]
|
|
assert_equal([2,4,6,8], @obj.flat_map {|i| i.map{|j| j*2} })
|
|
|
|
proc = Proc.new {|i| i.map{|j| j*2} }
|
|
assert_equal([2,4,6,8], @obj.flat_map(&proc))
|
|
|
|
lambda = ->(i) { i.map{|j| j*2} }
|
|
assert_equal([2,4,6,8], @obj.flat_map(&lambda))
|
|
|
|
assert_equal([[1,2],0,[3,4],1],
|
|
@obj.each_with_index.flat_map {|x, i| [x,i] })
|
|
|
|
proc2 = Proc.new {|x, i| [x,i] }
|
|
assert_equal([[1,2],0,[3,4],1],
|
|
@obj.each_with_index.flat_map(&proc2))
|
|
|
|
lambda2 = ->(x, i) { [x,i] }
|
|
assert_equal([[1,2],0,[3,4],1],
|
|
@obj.each_with_index.flat_map(&lambda2))
|
|
end
|
|
end
|