From: Joey Zhou <yimutang@...>
Date: 2011-04-24T21:45:06+09:00
Subject: Re: Does String#encode in Ruby 1.9.2 have option :fallback?

Y. NOBUOKA wrote in post #994724:
> Hi,
>
> You can use :fallback option on ruby 1.9.2.
> I think you must not set :undef option when you use :fallback option.
>
> # example on ruby 1.9.2p180
> # U+3042 is a Japanese character, and it cant express in US-ASCII
> "\u3042".encode( Encoding::US_ASCII, fallback: { "\u3042" => 'a' } )
> #=> "a"

Thank you! It works.

Is there any tricky skill about the :fallback?


str = "\u4ced\u9d12"
#replace_hash = {"\u4ced"=>"x"}
replace_hash = Hash.new {|hash,key| "[#{key.ord}]"}
print str.encode("gbk", fallback: replace_hash)

I want to do this, but failed. It seems :fallback cannot be a dynamic
hash?

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