目录一、整数索引二、切片索引2.1、一维数组切片2.2、多维数组切片三、整数数组索引3.1、 一维数组的整数数组索引3.2、多维数组的整数数组索引四、布尔索引五、花式索引数组索引是指使用方括号（[]）来索引数组值,nu
memset is sometimes used to initialize data in a constructor like the example below. Does it work in general ? Is it a good idea in general?
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