CODEWITHSUNDEEP
ruby
Kyle Decot
Kyle Decot

Reputation: 20815

Encoding Defaulting to ASCII-8BIT

I have the following file:

# encoding: UTF-8
a = 1 << 7
puts a.chr.encoding

This gives me back ASCII-8BIT. Why doesn't this give back UTF-8 and I would expect?

Upvotes: 1

Views: 192

Answers (1)

Vasfed
Vasfed

Reputation: 18464

chr has a encoding parameter, defaulting to US-ASCII, when char is < 0x80 and ASCII-8BIT for < 0xff (there UTF is identical to ASCII):

65.chr.encoding                   # => #<Encoding:US-ASCII>
128.chr.encoding                  # => #<Encoding:ASCII-8BIT>
255.chr.encoding                  # => #<Encoding:ASCII-8BIT>
256.chr.encoding                  # => RangeError: 256 out of char range

Encoding.default_internal = Encoding::UTF_8
65.chr.encoding                   # => #<Encoding:US-ASCII>
255.chr.encoding                  # => #<Encoding:ASCII-8BIT>
256.chr.encoding                  # => #<Encoding:UTF-8>

65.chr(Encoding::UTF_8).encoding  # => #<Encoding:UTF-8>
128.chr(Encoding::UTF_8).encoding # => #<Encoding:UTF-8>
500.chr(Encoding::UTF_8).encoding # => #<Encoding:UTF-8>

Upvotes: 3

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