encode!(*args) public

The first form transcodes the contents of str from str.encoding to encoding. The second form transcodes the contents of str from src_encoding to dst_encoding. The options Hash gives details for conversion. See String#encode for details. Returns the string even if no changes were made.

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April 2, 2013 - (v1_9_3_392)
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output GBK

‘I am 中国人’.encode(‘gbk’,‘utf-8’)