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Commit 5ccd29b

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author
VincentJ
committed
[C]增加了列表的一些相关操作(Java中的数组)
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‎.idea/inspectionProfiles/Project_Default.xml‎

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‎.idea/vcs.xml‎

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‎chapter2/ArrayInPy.py‎

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# 定义列表--Java中的数组
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books = ["《红楼梦》", "《围城》", "when happiness knocked"]
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print(books)
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# 获取
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print(books[1])
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print(books[2].title())
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# 访问最后一个,以此类推,带-号就是倒数第几个
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print(books[-1])

‎chapter2/CRUD.py‎

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data = [0, 1, 2, 3, 4, 5, 6]
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# 修改数据
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data[-1] = 10
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print(data)
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# 增加数据
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data[-1] = 6
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data.append(7)
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print(data)
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# 初始化
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data2 = []
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data2.append(100)
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data2.append(101)
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print(data2)
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# 插入数据
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data.insert(0, -1)
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print(data)
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data.insert(-1, 8)
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print(data)
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# 删除数据
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del data[-2]
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print(data)
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firstData = data.pop()
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print(firstData)
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print(data)
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# 删除并获取第二个索引的数据
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secondData = data.pop(1)
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print(secondData)
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print(data)
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# 使用remove删除制定值
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val4 = data[4]
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print("我要删除值是" + str(val4) + "的数据")
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data.remove(val4)
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print(data)
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data = [1, 2, 3, 4]
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print(data)
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print("在中间插入一个100")
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length = len(data)
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print("列表的长度:" + str(length))
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data.insert(int(len(data) / 2), 100)
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print(data)
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# sort永久排序
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newData = ["China", "Japan", "English", "Canada", "France"]
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newData.sort()
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print(newData)
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# 倒序(也是永久)
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newData.sort(reverse=True)
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print(newData)
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# sorted()临时排序
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print(sorted(newData))
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print(newData)
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# reverse()反转输出(永久修改顺序)
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print("反转输出")
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newData.reverse()
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print(newData)
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# len()确定长度
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print("newData的length:" + str(len(newData)))
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# 当且仅当列表为空的时候,通过-1来获取最后的一个元素才会出错

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