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fix: adapt missing ruby style guide (#1216)
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@@ -31,11 +31,11 @@ nums << 4
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puts "添加元素后 nums = #{nums}"
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# 在中间插入元素
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nums.insert 3, 6
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nums.insert(3, 6)
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puts "在索引 3 处插入元素 6 ,得到 nums = #{nums}"
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# 删除元素
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nums.delete_at 3
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nums.delete_at(3)
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puts "删除索引 3 处的元素,得到 nums = #{nums}"
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# 通过索引遍历列表
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