ruby/doc/string/each_byte.rdoc
2025-07-22 17:55:06 -04:00

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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 = []
'тест'.each_byte {|byte| a.push(byte) } # Four 2-byte characters.
a # => [209, 130, 208, 181, 209, 129, 209, 130]
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].