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With a block given, calls the block with each successive codepoint from +self+;
each {codepoint}[https://en.wikipedia.org/wiki/Code_point] is the integer value for a character;
returns +self+:
a = []
'hello'.each_codepoint do |codepoint|
a.push(codepoint)
end
a # => [104, 101, 108, 108, 111]
a = []
'こんにちは'.each_codepoint do |codepoint|
a.push(codepoint)
end
a # => [12371, 12435, 12395, 12385, 12399]
With no block given, returns an enumerator.
Related: see {Iterating}[rdoc-ref:String@Iterating].
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