返回数组对象转json

要将数组对象转换为JSON格式，可以使用JSON.stringify()方法。这个方法将数组对象转换为JSON字符串。例如，如果有一个数组arr，包含\[1,2,3, { a : 1 }\]，可以使用JSON.stringify(arr)将其转换为JSON字符串。\[1\]
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