duplicates

How can I remove duplicates from a TextBox?

由 喜你入骨 提交于 2019-12-10 16:09:55
问题 I have a text box that has each item on a new line. I am trying to remove duplicates from this textBox. I can't think of anything. I tried adding each item to an array and the removing the duplicates, but it doesn't work. Are there any other options? 回答1: yourTextBox.Text = string.Join(Environment.NewLine, yourArray.Distinct()); 回答2: Building on what Anthony Pegram wrote, but without needing a separate array: yourTextBox.Text = string.Join(Environment.NewLine, yourTextBox.Lines.Distinct());

What is the best way to check for duplicate TEXT fields in MYSQL/PHP?

由 ♀尐吖头ヾ 提交于 2019-12-10 16:09:12
问题 My code pulls ~1000 HTML files, extracts the relevant information & then stores that information in a MySQL TEXT field (as it is usually quite long). I am looking for a system to prevent duplicate entries in the DB My first idea is to add a HASH field to the table (probably MD5), pull the hash list at the beginning of each run & check for duplicates before inserting into the DB. Second idea is to store the file length (bytes or chars or whatever), index that, & check for duplicate file

Counting the number of pairs in a vector

由 [亡魂溺海] 提交于 2019-12-10 16:05:03
问题 Suppose that I have the following vector: V<-c(-1,-1,1,1,1,-1,-1,1) And I want to know the number of different pairs in the following categories: (1,1), (-1,1), (1,-1), and (-1,-1) In my example, there is exactly 1 pair of each. I have been trying to solve this problem with the function split and setkey , but I can't do the categorization. 回答1: ng <- length(V)/2 table(sapply(split(V,rep(1:ng,each=2)),paste0,collapse="&")) # -1&-1 -1&1 1&-1 1&1 # 1 1 1 1 Here is a better alternative that also

What algorithm to use to delete duplicates?

由 烈酒焚心 提交于 2019-12-10 15:58:55
问题 Imagine that we have some file, called, for example, "A.txt". We know that there are some duplicate elements. "A.txt" is very big, more than ten times bigger than memory, maybe around 50GB. Sometimes, size of B will be approximately equal to size of A, sometimes it will be many times smaller than size of A. Let it have structure like that: a 1 b 2 c 445 a 1 We need to get file "B.txt", that will not have such duplicates. As example, it should be this: a 1 b 2 c 445 I thought about algorithm

How to expire state of dropDuplicates in structured streaming to avoid OOM?

由 我是研究僧i 提交于 2019-12-10 15:17:58
问题 I want to count the unique access for each day using spark structured streaming, so I use the following code .dropDuplicates("uuid") and in the next day the state maintained for today should be dropped so that I can get the right count of unique access of the next day and avoid OOM. The spark document indicates using dropDuplicates with watermark, for example: .withWatermark("timestamp", "1 day") .dropDuplicates("uuid", "timestamp") but the watermark column must be specified in dropDuplicates

How to remove rest of the rows with the same ID starting from the first duplicate?

由 故事扮演 提交于 2019-12-10 14:53:26
问题 I have the following structure for the table DataTable : every column is of the datatype int, RowID is an identity column and the primary key. LinkID is a foreign key and links to rows of an other table. RowID LinkID Order Data DataSpecifier 1 120 1 1 1 2 120 2 1 3 3 120 3 1 10 4 120 4 1 13 5 120 5 1 10 6 120 6 1 13 7 371 1 6 2 8 371 2 3 5 9 371 3 8 1 10 371 4 10 1 11 371 5 7 2 12 371 6 3 3 13 371 7 7 2 14 371 8 17 4 ................................. ................................. I'm

Efficiently ordered data-structure that supports duplicate keys

由 久未见 提交于 2019-12-10 14:36:32
问题 I am looking for a data structure that orders objects at insertion efficiently. I would like to order these objects (in this case individuals) based on the value of a particular variable (in this case the fitness). The data structure should allow duplicate keys since a particular fitness value can occur in different individuals. This is a problem because for example the TreeMap data structure does not allow duplicate keys. I would prefer to use this type of tree-like structure because of it's

Javascript files appears duplicated in ajax navigation

由 假装没事ソ 提交于 2019-12-10 14:22:37
问题 I´m having troubles with AJAX navigation, the problem is that the javascript files loaded remains in the browser after the new content is loaded even they aren't in the DOM anymore, and they appears as VM files in the browser console and execute the code inside it. I don't want that happen because the javascript file it supposed to be replaced when the new content comes via AJAX . My DOM structure is like this: <body> <header></header> <main id="contentToBeReplaced"> <p>New content with its

No duplicates in SQL query

由 ↘锁芯ラ 提交于 2019-12-10 13:52:28
问题 I'm doing a select in MySQL with an inner join: SELECT DISTINCT tblcaritem.caritemid, tblcar.icarid FROM tblcaritem INNER JOIN tblprivatecar ON tblcaritem.partid = tblprivatecar.partid INNER JOIN tblcar ON tblcaritem.carid = tblcar.carid WHERE tblcaritem.userid=72; Sometimes I get duplicates of tblcaritem.caritemid in the result. I want to make sure to never get duplicates of tblcaritem.caritemid, but how can I do that? I tried to use DISTINCT but it just checked if the whole row is a

Want non duplicate elements from list

由 别等时光非礼了梦想. 提交于 2019-12-10 13:45:34
问题 From following list I need only 'wow' and 'quit'. List<String> list = new ArrayList(); list.add("test"); list.add("test"); list.add("wow"); list.add("quit"); list.add("tree"); list.add("tree"); 回答1: you can check the frequency of an element in the Collection and rule out the elements which have frequency higher than 1. List<String> list = new ArrayList<String>(); list.add("test"); list.add("test"); list.add("wow"); list.add("quit"); list.add("tree"); list.add("tree"); for(String s: list){ if
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