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With a block given, calls the block with each successive byte from +self+;
returns +self+:
a = []
'hello'.each_byte {|byte| a.push(byte) } # Five 1-byte characters.
a # => [104, 101, 108, 108, 111]
a = []
'こんにちは'.each_byte {|byte| a.push(byte) } # Five 3-byte characters.
a # => [227, 129, 147, 227, 130, 147, 227, 129, 171, 227, 129, 161, 227, 129, 175]
With no block given, returns an enumerator.
Related: see {Iterating}[rdoc-ref:String@Iterating].
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