To remove duplicate lines just press Ctrl + F, select the “Replace” tab and in the “Find” field, place: ^(.*?)$\s+?^(?=.*^\1$). In search mode check “Regular expression” and click on replace all.…

step1 to sort and remove space. Since Notepad++ Version 6 you can use this regex in the search and replace dialogue: ^(.*?)$\s+?^(?=.*^\1$) and replace with nothing. This leaves from all duplicate rows the last occurrence in the file.…

How would you remove duplicate lines from a file that is  much too large to fit in memory? The duplicate lines are not necessarily adjacent, and say the file is 10 times bigger than RAM. A better solution is to use HashSet to store each line of input…

Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your result is the smallest in lexicographical order among all possible results. Example: Given "bcabc&q…

Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your result is the smallest in lexicographical order among all possible results. Example: Given "bcabc&q…

Remove Duplicate Letters I Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. Example: Given "bcabc"Return "abc" Given "cbacdcbc"Return "abcd&qu…

原题链接在这里:https://leetcode.com/problems/remove-duplicate-letters/ 题目: Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your result is the smallest in lexic…

https://leetcode.com/problems/remove-duplicate-letters/ Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your result is the smallest in lexicographical o…

316. Remove Duplicate Letters Total Accepted: 2367 Total Submissions: 12388 Difficulty: Medium Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your resu…

Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your result is the smallest in lexicographical order among all possible results. Example 1: Input: "bcab…