Bug #12029: Not all elements are yielded when count is given a block

• Status: Rejected
• Assignee: -
• Target version: -
• ruby -v: 2.3.0
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN

[jsyeo (Jason Yeo)]

When count is called on an enumerable that yields multiple elements, not all elements are yielded to the block.

def foo
  yield 1, 2
end

to_enum(:foo).count { |e| e == [1, 2] }
# Returns: 0
# Expected: 1

It appears that only the first element is yielded:

to_enum(:foo).count { |e| p e; e == [1, 2] }
# Prints 1

[Hanmac (Hans Mackowiak)]

you need splash:

to_enum(:foo).count { |*e| e == [1, 2] } #=> 1

[jsyeo (Jason Yeo)]

Hans Mackowiak wrote:

you need splash:

to_enum(:foo).count { |*e| e == [1, 2] } #=> 1

hmmm, okay. I think I misunderstood how some Enumerable methods work. Thanks.

How do I close this issue by the way?

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)
• Status changed from Open to Rejected