1. List Init
1.var = [x for x in x]:快速定義List的使用方式,可以搭配if來使用
2.range(start:end):產生range的int
3.len() : 長度
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checkMap = [[0 for y in range(nYCount)] for x in range(nXCount)] nLength = len(checkMap)
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基本LeetCode
2. Object Init
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listVar = list([5,3,3]) setVar = set([5,3,3]) print(listVar) print(setVar)
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基本LeetCode 771 807 595 804 491 832 728
3. String
1.count : 計算內容物的次數
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class : def judgeCircle(self, moves): return moves.count('L') == moves.count('R') and moves.count('U') == moves.count('D') """ :type moves: str :rtype: bool """
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基本LeetCode 657
4. List[int]
1.index : 找到對應的index
2.max : 取出最大值
1
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return (A.index(max(A)))
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基本LeetCode 852
5. binary Tree
binary Tree的使用範例
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class (object): def mergeTrees(self, t1, t2): NewNode = TreeNode(0) def nextLoop(tCurrent,tcopy): if tcopy == None: return tCurrent.val += tcopy.val print(tcopy.val) if tcopy.left is not None: if tCurrent.left == None: tCurrent.left = TreeNode(0) nextLoop(tCurrent.left,tcopy.left) if tcopy.right is not None: if tCurrent.right == None: tCurrent.right = TreeNode(0) nextLoop(tCurrent.right,tcopy.right) nextLoop(NewNode,t1) nextLoop(NewNode,t2) if t1 == None and t2 == None: NewNode = None return NewNode """ :type t1: TreeNode :type t2: TreeNode :rtype: TreeNode """
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基本LeetCode 617
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