Wrong description for `limit` parameter for IO#gets
"If the first argument is an integer, or optional second argument is given, the returning string would not be longer than the given value in bytes."
require "stringio" io = StringIO.new "こんにちは" string = io.gets(1) puts string #=> "こ" puts string.bytes.length #=> 3
The returning value number of bytes (3) is longer than the given value (1), so it contradicts the description.
I guess the implementation reads chars until the total number of bytes read is equal or bigger than the limit.
But I don't know how to describe this behaviour in a way that's clear to the user.
Updated by davydov_anton (Anton Davydov) over 4 years ago
The problem in UTF-8 encoding. For example japanese characters are represented by 3 bytes:
StringIO.new("こんにちは").gets(1) # => "こ" StringIO.new("こんにちは").gets(2) # => "こ" StringIO.new("こんにちは").gets(3) # => "こ" StringIO.new("こんにちは").gets(4) # => "こん"
Also I created RP in ruby/ruby repository where I updated