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Add Set#join #4

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Merged
knu merged 1 commit into from
Dec 16, 2020
Merged

Add Set#join #4

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6 changes: 6 additions & 0 deletions lib/set.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -628,6 +628,12 @@ def tsort_each_child(node, &block)
end
end

# Returns a string created by converting each element of the set to a string
# See also: Array#join
def join(separator=nil)
to_a.join(separator)
end

InspectKey = :__inspect_key__ # :nodoc:

# Returns a string containing a human-readable representation of the
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5 changes: 5 additions & 0 deletions test/test_set.rb
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Expand Up @@ -741,6 +741,11 @@ def test_freeze_clone_false
assert_equal Set[1,2,3], set1
end if Kernel.instance_method(:initialize_clone).arity != 1

def test_join
assert_equal('123', Set[1, 2, 3].join)
assert_equal('1 & 2 & 3', Set[1, 2, 3].join(' & '))
end

def test_inspect
set1 = Set[1, 2]
assert_equal('#<Set: {1, 2}>', set1.inspect)
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