array = [1,2,3,{:name => "Peter"}, "hello"]
array.each do |element| # it can be "inject", "map" or other iterators
# How to return object "array" and position of "element"
# also next and priviouse "element"
end
array = [1,2,3,{:name => "Peter"}, "hello"]
arr
阅读背景：
迭代时返回迭代对象和索引
来源：互联网
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