From: born in USSR <psixxx@...>
Date: 2010-06-27T21:33:27+09:00
Subject: Convert \uXXXX to character

I have string: '\u041f\u0440\u0438\u0432\u0435\u0442!' and i need to
convert it to string such as 'привет!'.
I can convert string to '041f 0440 0438 0432 0435 0442', then convert to
decimal and at the end convert each code to character with function:

> str.scan(/[0-9]+/).each {|x| result_str << x.to_i}

but i don't think that it is the most rational way.
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