I was searching for string encoding issues in Ruby. Here is the summary of what I learnt, in case its useful to anyone else of if anyone has any corrections to this.
Ruby 1.8 support for encoding: * A comment like "# -*- coding: utf-8 -*-" at the start of the file is supposed to determine how to parse a .rb file, but I haven't really figured out how to make this work. Non-ansi characters cause an error while loading the file. * ruby.exe -K<kcode> sets $KCODE (which can also be set programmaticaly) * $KCODE affects the following: * Determines the encoding to use to parse .rb files. Normally, identifiers have to be ANSI, but the limitation is removed if $KCODE is set to "UTF8". * Affects whether inspect escapes non-ascii chars, or if it leaves them as is. * Affects how regexps without an explicit encoding interpret the input string. Ruby 1.9 support for encodings: * Identifiers can be non-ANSI by default. Ruby 2.0 support for encodings: * Each string and symbol knows its own encoding, and String#force_encoding can change the encoding of an existing string. * IO#encoding to control encoding to use for reading/writing from disk
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