I wanna to match string that contain \xa0, Like:
"\xa0" =~ /\xa0/
But error will throw with:
SyntaxError: (eval):2: invalid multibyte escape: /\xa0/
I am try to use Unicode to match:
"\xa0" =~ /\u00a0/
error will throw too:
ArgumentError: invalid byte sequence in UTF-8
So, how to match \xa0 in ruby
Not every byte sequence is a valid Unicode string. (or more specifically UTF-8)
Your single-byte string for example is not:
str = "\xa0"
str.encoding #=> #<Encoding:UTF-8>
str.valid_encoding? #=> false
str.codepoints # ArgumentError (invalid byte sequence in UTF-8)
To work with an arbitrary string, you have set its encoding to binary / ASCII:
str = "\xa0".b # <-- note the .b
str.encoding #=> #<Encoding:ASCII-8BIT>
str.valid_encoding? #=> true
str.codepoints #=> [160]
and also set the regexp encoding to ASCII: (via the n modifier)
str =~ /\xa0/n
#=> 0
