deduplication

Check the code by removing and searching multi-dimensional arrays: $ A = array ('P', 'H'), array ('P', 'r'), 'o '); If (in_array (array ('P', 'H'), $ )){ Echo "'ph' was found \ n "; } If (in_array (array ('F', 'I'), $ )){ Echo "'Fi 'was found \ n "; } If (in_array ('O', $ )){ Echo "'O' was found \ n "; } Multi-dimensional array search is supported! $ Key = array ('0' => array ('en _ termin' => 'h', 'pos' => 'N ', 'CN _ define '=> 'you'), '1' => array ('en _ termin' => 'W', 'pos

Php array deduplication function code example /** * Function for removing repeated values in the array * By bbs.it-home.org */ Function array_assoc_unique ($ arr, $ key ){ $ Tmp_arr = array (); Foreach ($ arr as $ k =>$ v ){ If (in_array ($ v [$ key], $ tmp_arr )){ Unset ($ arr [$ k]); } Else { $ Tmp_arr [] = $ v [$ key]; } } Sort ($ arr ); Re

This article mainly introduces the php two-dimensional array merging and deduplication methods. The example analyzes the php techniques for merging arrays and deleting repeated items, for more information about how to merge and deduplicate two-dimensional php arrays, see the example in this article. Share it with you for your reference. The specific implementation method is as follows: $ Arr = array_merge ($ labels, $ label); // merge the two arr

) { WuSystem.err.println ("Usage:dedup ); -System.exit (2); About } $ - //Defining Job Objects -Job Job =NewJob (conf, "Dedup"); - //registering a distributed class AJob.setjarbyclass (Dedup.class); + //Register Mapper Class theJob.setmapperclass (Map.class); - //registering a merge class $Job.setcombinerclass (Reduce.class); the //Register Reducer Class theJob.setreducerclass (Reduce.class); the //registering the output format class theJo

var New Array (); if ($ ("input[name= ' type ']"). val ()! = "") {= $ ("input[name= ' type ')"). Val (). Split ("," ); if (SelectedValue! = "" $.inarray (SelectedValue, valuearr) = =-1) { valuearr.push (selectedvalue); } $ ("input[name= ' type ']"). Val (Valuearr.sort (). join ());JavaScript strings are transferred to and from arrays, and data

Deduplication of javascript Arrays // Remove the Array of numeric elements function sortnum (a, B) {return a-B;} Array. prototype. unique1 = function () {this. sort (sortnum); var newnumbers = [this [0]; for (var I = 0; I

Python refresh question-use stdin for input and output-random array deduplication, pythonstdin Original question address: Explicit Random Number The rules for input of a given variable may vary in different websites and different given questions. Generally, the most common input method is the sys. stdin method. For example, this simple question: 1.Input description:Input Multiple rows, enter the number of random integers, and then enter the correspond

Private Static voidcheck (string[] array) {//what are the string arrays that contain non-repeating strings? The number of each repetitionmap//① Traversal MapSystem.out.println ("Traverse key and Value by Map.keyset ():"); for(String key:map.keySet ()) {System.out.println ("The array is:" + key + "=" +Map.get (key)); } //②mapset (). Iterator ()SYSTEM.OUT.PRINTLN ("Traversal of key and value through Map.entryset () iterator ()"); IteratorMap.entryset (). iterator (); while(It.hasn

Detailed explanation of the javascript array deduplication problem, detailed explanation of the javascript Array First, I want to create another result array to store non-duplicated data in the original array. Traverse the original array and compare it with the elements in the result array to check whether the elements are repeated. As a result, I wrote the following:Code: Array.prototype.clearRepetitionA = function(){ var result = []; var isRepet

Array. prototype. unique1 = function (){Var arr = [];For (var I = 0; I // Check whether there are any arrays in it. If not, put them in.If (arr. indexOf (this [I]) =-1 ){Arr. push (this [I]) } }Return arr;}Array. prototype. unique2 = function (){Var arr = [],Json = {};For (var I = 0; I // Use a hash table and use keywords to determine deduplication// If no current entry exists in the hash tableIf (! Json [this [I]) {Json [this [I] = true;Arr. push (th

Array deduplication Src: http://yiminghe.javaeye.com/blog/524716 This is a classic problem. After removing the repeated elements in the array, I searched the internet and found that most of them are the solution regardless of reposted or original: Solution:Js Code Function uniq (array ){ Var map = {}; Var re = []; For (var I = 0, l = array. length; I If (typeof map [array [I] = "undefined "){ Map [array [I] = 1; Re. push (array [I]); } }

PHPlistNewArraylist(); for(inti=0; i) {List.add (str[i]); } list.remove (2);//list.remove ("Php")string[] Newstr= List.toarray (NewSTRING[1]);//returns an array containing the specified type of all objects } //add an element to an array Public Static voidTESTC () {String [] str= {"Java", "C + +", "Php", "C #", "Python"};//Add RubylistNewArraylist(); for(inti=0; i) {List.add (str[i]); } list.add (2, "Ruby");string[] Newstr= List.toarray (NewSTRING[1]);//returns an array containing th

added to resolve.2, this kind of repetition problem usually requires to keep the first record in the duplicate record, the operation method is as followsSuppose there is a duplicate field name,address, which requires the result set to be unique for both fieldsSelect Identity (int,1,1) as Autoid, * into #Tmp from TableNameSelect min (autoid) as autoid into #Tmp2 from #Tmp Group by name,autoidSELECT * from #Tmp where autoid on (select Autoid from #tmp2)The last select is the result set that name,

the drop statement releases all the space occupied by the table TRUNCATE statement by default see space released to Minextents Extent unless reuse storage is used; Truncate will reset the high watermark (back to the beginning).4. Speed, in general: drop> truncate > Delete.5. Security: Use Drop and truncate carefully, especially when there is no backup. Otherwise, it's too late to cry.6. On the use, want to delete some data rows with delete, note with the WHERE clause. The rollback segment shoul

Label:How is duplicate data removed from the Oracle database? When working with data tables, there are often duplicate data, so how do you delete them? Let's talk about removing data duplication from Oracle databases. There are two ways we are going to talk today.First, according to rowID come and go heavy.We all know that in Oracle database tables, each record has a unique rowid to identify, which allows us to go to the heavy query conditionWe have a test table, first of all, if we're going to

fields may not be repeated or repeated can be ignored.1, for the first kind of repetition, easier to solve, using[SQL]View PlainCopy Select Distinct * from tableName You can get a result set with no duplicate records.If the table needs to delete duplicate records (duplicate records retain 1), you can delete them as follows[SQL]View PlainCopy Select Distinct * to #Tmp from tableName Drop Table TableName SELECT * into tableName from #Tmp Drop Table #Tmp

Label:In a database table, duplicate values may be included. That's not a problem, but sometimes you might want to just list different values (distinct). Keyword DISTINCT is used to return only different values. Table A: 1. Acting on a single rowSelect distinct from A The following results are performed: Acting on multi-column Example 2.1Select distinct from A The following results are performed: In fact, it is the same way that access and SQL Server support it, depending on the name and ID t

Tags: unique values Group Stat author A10 sage how multiple artReference: Http://blog.sina.com.cn/s/blog_6c9d65a10101bkgk.htmlHttp://www.jb51.net/article/39302.htm 1, use distinct to weight (suitable for querying the total number of the whole table)There are multiple schools + teachers to contribute, need to count the total number of authorsSelect COUNT (author) as Total from files each author has a lot of contributions, there are duplicate records here. Select distinct author from files; It is

Label:CREATE TABLE #tp(Headerno VARCHAR (10),Machineno VARCHAR (10),Descrption NVARCHAR (20),Artno VARCHAR (20),Qty INT,Repartno varchar (20),Repqty INT) INSERT INTO #tp SELECT ' HD01 ', ' 0101520 ', N ' battery problem ', ' 102020 ', 2, ' 102020 ', 2INSERT INTO #tp SELECT ' HD01 ', ' 0101520 ', N ' battery problem ', ' 101010 ', 2, ' 202020 ', 2INSERT INTO #tp SELECT ' HD01 ', ' 0101520 ', N ' battery problem ', ' 126888 ', 2, ' 102020 ', 2INSERT INTO #tp SELECT ' HD02 ', ' 01012221 ', N ' d mo

--Under the sql2005, sql2000 can notCREATE TABLE TB (ID int,name varchar (4))Insert TB Select 1, ' AA 'UNION ALL Select 1, ' AA 'UNION ALL Select 2, ' BB 'UNION ALL select 3, ' BB 'UNION ALL Select 4, ' CC 'UNION ALL Select 1, ' AA 'UNION ALL Select 4, ' CC 'Delete a From(select Id,name,rn=row_number () over (partition by id,name order by ID) from TB) a where rn>1SELECT * FROM TBOriginal: http://blog.csdn.net/hzvcan/article/details/4862927SQL Server Data ded