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String#delete_prefix is documented for 2.4.1, but does not exist until 2.5.0dev. #80

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ghost opened this issue Aug 12, 2017 · 0 comments

ghost commented Aug 12, 2017

String#delete_prefix and String#delete_prefix! appear in the documentation for Ruby 2.4.1, but when I try to use them I get the following error:

"hello".delete_prefix("hel")
NoMethodError: undefined method `delete_prefix' for "hello":String
	from (irb):1
	from /Users/alex/.rbenv/versions/2.4.1/bin/irb:11:in `<main>'

These work properly in 2.5.0dev:

"hello".delete_prefix("hel")
=> "lo"

eregon mentioned this issue

Why is Dir.children documented for Ruby 2.4.1? #81

Open

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