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With a block given, calls the block with each successive character from +self+;
returns +self+:
a = []
'hello'.each_char do |char|
a.push(char)
end
a # => ["h", "e", "l", "l", "o"]
a = []
'こんにちは'.each_char do |char|
a.push(char)
end
a # => ["こ", "ん", "に", "ち", "は"]
With no block given, returns an enumerator.
Related: see {Iterating}[rdoc-ref:String@Iterating].
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