DUPLICATES

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1047.remove-all-adjacent-duplicates-in-string 删除字符串中所有相邻重复项

利用stack(栈)这一数据结构，当前字符与栈顶字符相等时，pop()，最后把栈中的字符还原成字符串，注意栈是LIFO的，因此还原字符串时要注意顺序。 #include <stack> #include <string> using std::stack; using std::string; class Solution { public: string removeDuplicates(string

python合并俩列Series

import pandas as pd import csv path='test.csv' data=pd.read_csv(path) x=data['label'] xt=x.drop_duplicates( keep='first', inplace=False) path1='val.csv' data1=pd.read_csv(path1) x1=data1['label'] xv=x1.dro

SAP ABAP delete adjacent duplicates 坑

前一段时间调试一个程序的，半天没发现问题在哪里，经过测试才发现 delete adjacent duplicates from itab 和 delete adjacent duplicates from itab comparing all fields还是有区别的：　　前者相邻两行数据，如果除金额字段以外的其他字段都相同，则去重复删除其中一行；　　后者相邻两

LeetCode 80 Remove Duplicates from Sorted Array II 删除有序数组中的重复元素 II

题目描述 Given an integer array nums sorted in non-decreasing order, remove some duplicates in-place such that each unique element appears at most twice. The relative order of the elements should be kept the same. Since it is impossible to change the length o

leetcode-0083 remove duplicates from sorted list

Given the head of a sorted linked list, delete all duplicates such that each element appears only once. Return the linked list sorted as well. Example 1: Input: head = [1,1,2] Output: [1,2] Example 2: Input: head = [1,1,2,3,3] Output: [1,2,3] Constraints

LeetCode 0082 Remove Duplicates from Sorted List II

原题传送门 1. 题目描述 2. Solution 1 1、思路分析递归写法。 1> 递归出口。遍历到链表的末尾，直接返回当前遍历结点。 2> 规模递减。如果当前结点值与其后继结点值不相等，处理后继结点，把处理结果挂到当前结点后面。如果当前结点与其后继结点相等，遍历链表，找到不重复的结点，处理不

LeetCode 0083 Remove Duplicates from Sorted List

原题传送门 1. 题目描述 2. Solution 1 1、思路分析迭代法。 2、代码实现 package Q0099.Q0083RemoveDuplicatesfromSortedList; import DataStructure.ListNode; public class Solution2 { public ListNode deleteDuplicates(ListNode head) { if (head == null

LeetCode 0080 Remove Duplicates from Sorted Array II

原题传送门 1. 题目描述 2. Solution 1 1、思路分析 Question wants us to return the length of new array after removing duplicates and that we don't care about what we leave beyond new length , hence we can use i to keep track of the position and update the arr

Lesson11——Pandas去重函数：drop_duplicates()

pandas目录　　“去重”通过字面意思不难理解，就是删除重复的数据。在一个数据集中，找出重复的数据删并将其删除，最终只保存一个唯一存在的数据项，这就是数据去重的整个过程。删除重复数据是数据分析中经常会遇到的一个问题。通过数据去重，不仅可以节省内存空间，提高写入性能，还可以提升

82. Remove Duplicates from Sorted List II

SLinkedList<int> slist = new SLinkedList<int>(); slist.AppendRange(new[] { 6, 1, 1, 2, 3, 3, 3, 4, 5, 5 }); Console.WriteLine("Before: " + slist.Print()); var rslt = slist.DeleteDuplicates(); Console.WriteLine(" After: " +

Remove Duplicates from Unsorted List

Source Write a removeDuplicates() function which takes a list and deletes any duplicate nodes from the list. The list is not sorted. For example if the linked list is 12->11->12->21->41->43->21, then removeDuplicates() should convert t

【leetcode】26 Remove Duplicates from Sorted Array

26. Given an integer array nums sorted in non-decreasing order, remove the duplicates in-place such that each unique element appears only once. The relative order of the elements should be kept the same. Since it is impossible to change the length of the

1047. Remove All Adjacent Duplicates In String

这道题很简单，其实是一个Stack的问题，但是不用Stack，用一个StringBuilder就可以解决，时间复杂度和空间复杂度都是O(n). public String removeDuplicates(String s) { StringBuilder sb = new StringBuilder(); for (int i = 0; i < s.length(); i++) {

ABAP 删除内表重复数据

SORT <内表> BY <字段> [ascending/descending]. DELETE ADJACENT DUPLICATES FROM <内表> COMPARING <字段> *删除所有字段相同数据SORT <内表> BY <字段> <字段>[ascending/descending]. DELETE ADJACENT DUPLICATES FROM <内表> COMPARING ALL FIEL

Remove Duplicates from Sorted List II

Source Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list. Example Given 1->2->3->3->4->4->5, return 1->2->5. Given 1->1->1->2->3, return 2-&

pandas之去重

“去重”通过字面意思不难理解，就是删除重复的数据。在一个数据集中，找出重复的数据删并将其删除，最终只保存一个唯一存在的数据项，这就是数据去重的整个过程。删除重复数据是数据分析中经常会遇到的一个问题。通过数据去重，不仅可以节省内存空间，提高写入性能，还可以提升数据集的精确度，

DataFrame指定位置插入列 allow_duplicates参数

https://pandas.pydata.org/docs/reference/api/pandas.DataFrame.insert.html?highlight=insert#pandas.DataFrame.insert

Remove Duplicates from Sorted List

Source Given a sorted linked list, delete all duplicates such that each element appear only once. Example Given 1->1->2, return 1->2. Given 1->1->2->3->3, return 1->2->3. 题解遍历之，遇到当前节点和下一节点的值相同时，删除下一节点，并将当前节点next值指向下一个节

drop_duplicates 去重

方法：DataFrame.drop_duplicates(subset=None, keep='first', inplace=False) drop_duplicate方法是对DataFrame格式的数据，去除特定列下面的重复行。返回DataFrame格式的数据。 subset : column label or sequence of labels, optional用来指定特定的列，默认所有列 keep : {‘fir

Python学习笔记：pd.drop_duplicates删除重复行

drop_duplicates 方法实现对数据框 DataFrame 去除特定列的重复行，返回 DataFrame 格式数据。一、使用语法及参数使用语法： DataFrame.drop_duplicates(subset=None, keep='first', inplace=False, ignore_index=False) 参数： subset -- 指定特定的列默认所有列 keep:{'first', '

Day2：Leetcode-83.Remove Duplicates from Sorted List

Solution 1： It is a sorted linked list, we can delete all duplicates one by one,but at first I made a mistake in case [0,0,0,0,0] , because I set pre number 0,therefore I turn it to be -99,that is okay. class Solution { public: ListNode* deleteDupl

pandas处理大数据题目的操作

1、用法：DataFrame.drop(labels=None, axis=0, index=None, columns=None, inplace=False) 2、参数说明： labels：要删除的行/列的名字，用列表给出 axis：默认为0，即删除行，删除列时指定为1 index：直接指定要删除的行 columns：直接指定要删除的列 inplace：默认为False，即删除操作不改变元数据，而

Leetcode 83：Remove Duplicates from Sorted List

Leetcode 83：Remove Duplicates from Sorted List Given the head of a sorted linked list, delete all duplicates such that each element appears only once. Return the linked list sorted as well. 说人话：去掉有序链表中重复的元素要点：链表有序去重复举例： [法1

boost::hana::detail::has_duplicates用法的测试程序

boost::hana::detail::has_duplicates用法的测试程序实现功能 C++实现代码实现功能 boost::hana::detail::has_duplicates用法的测试程序 C++实现代码 #include <boost/hana/detail/has_duplicates.hpp> #include <boost/hana/integral_constant.hpp> namespace hana = bo