Bug #16976: Documentation bug in Proc

• Status: Closed
• Assignee: -
• Target version: -
• Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN

[kwerle (Kurt Werle)]

https://ruby-doc.org/core-2.7.0/Proc.html

About 1/3 of the way through the docs, it states:

Lambda semantics is typically preserved during the proc lifetime, including &-deconstruction to a block of code:

p = proc {|x, y| x }
l = lambda {|x, y| x }
[[1, 2], [3, 4]].map(&p) #=> [1, 2]
[[1, 2], [3, 4]].map(&l) # ArgumentError: wrong number of arguments (given 1, expected 2)

The 3rd line of code should be:

[[1, 2], [3, 4]].map(&p) #=> [1, 3]

[jeremyevans0 (Jeremy Evans)]

Thanks for the report! I'll fix the documentation shortly.

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Closed

This was fixed earlier in 39a1959d289ecba5e61431deaef239123c3f0fcc. I don't consider it worth backporting.