deduplication software

// Define an array to store the results after deduplication$ Result = array ();// Read the uid list file$ Fp = fopen('test.txt ', 'r ');While (! Feof ($ fp )){ $ Uid = fgets ($ fp );$ Uid = trim ($ uid );$ Uid = trim ($ uid ,"");$ Uid = trim ($ uid ,"");If ($ uid = ''){ Continue;} // Use uid as the key to check whether the value existsIf (empty ($ result [$ uid]){ $ Result [$ uid] = 1;} }Fclose ($ fp );// Sa

Oracle has a data that is already 25 million data, the software used to this table data is very slow, so ready to one months ago the data cleared.My steps are (the bottom operations are all running in plsql)1. First export this month's data to a temporary table (the data is what you want to keep)CREATE TABLE temptable as select Id,name from table1 where sj>to_date (' 2013-7-31 23:59:59 ', ' yyyy-mm-dd hh24:mi:ss ');2, then the entire 25 million data d

Phpmysql removes duplicate data from millions of data records .? PHP Tutorial defines a number of groups, used for storing the final result resultarray(when reading the uid.pdf file, fpfopen(test.txt, r); while (! Feof ($ fp) {$ uidfgets ($ fp); $ ui // Define an array to store the results after deduplication $ Result = array (); // Read the uid list file $ Fp = fopen('test.txt ', 'r '); While (! Feof ($ fp )){$ Uid = fgets ($ fp );$ Uid = trim ($ ui

Hadoop written questions: Identify common friends of different people (consider data deduplication) Example: Zhang San: John Doe, Harry, Zhao Liu John Doe: Zhang San, tianqi, Harry The actual work, the data to reuse is still quite a lot of, including the empty value of the filter and so on, this article on data deduplication and inverted index detailed explanation. first, data

Hadoopmapreduce data deduplication assuming we have the following two files, we need to remove duplicate data. File0 [plain] 2012-3-1a2012-3-2b2012-3-3c2012-3-4d2012-3-5a2012-3-6b2012-3-7c2012-3-3cfile1 [plain] 2012-3-1b2012-3-2a2012-3-3b2012-3-4d2012-3- Hadoop mapreduce data deduplication assumes that we have the following two files, and we need to remove duplicate data. File0 [plain] 2012-3-1 a 2012-3-2 B

/// /// List generic deduplication/// /// /// Private void RemoveRepeaterUrl (ref List {For (int I = 0; I {For (int j = (I + 1); j {If (list [j] [ItemID] = list [I] [ItemID]){List. RemoveAt (j); // remove identical itemsI = 0; // deduplication from the beginning. If there are a large number of repeated items in the array, only one deduplication cannot solve the p

Mongodb deduplication, aggregation, query explanation, mongodb Aggregation I recently learned about mongodb and some people understand it: 1. deduplication Repeated template. getCollection (collectionName). distinct () returns the list set, which is the result after deduplication. 2. Aggregation Aggregation aggregation = Aggregation. newAggregation (Criteri

PHP two-dimensional array deduplication example analysis This article analyzes the PHP two-dimensional array deduplication method. We will share this with you for your reference. The details are as follows: We all know that the one-dimensional array is used to reuse the system function array_unique ($ arr) Then today I used a two-dimensional array, and I also want to remove duplicates. Baidu has a lot of d

: This article mainly introduces the PHP two-dimensional array deduplication method (retaining each key value while removing repeated items)-The uniqueness of the two-dimensional array, if you are interested in the PHP Tutorial, refer. Deduplicate the following two-dimensional array: $arr = array( '0'=>array( 'name'=>'james', 'age'=>30, ), '1'=>array( 'name'

PHP two-dimensional array deduplication method (preserving individual key values while removing duplicates)--uniqueness of two-dimensional arrays For the following two-dimensional arrays, it is required to be de-weighed: $arr = Array (' 0 ' =>array ( ' name ' = ' James ', ' age ' =>30, ), ' 1 ' =>array ( ' name ' = > ' Susu ', ' age ' =>2

1) Open the Add Server role and function wizard and click Next 650) This. width = 650; "Title =" clip_image002 "style =" border-top: 0px; border-Right: 0px; border-bottom: 0px; border-left: 0px; display: inline "border =" 0 "alt =" clip_image002 "src =" http://img1.51cto.com/attachment/201410/9/1559738_1412821674fued.jpg "" 558 "Height =" 395 "/> 2) Check the data deduplication function. 650) This. width = 650; "Title =" clip_image004 "style =" bor

Javascript array deduplication, javascript Array // 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 Javascript array deduplication Arr is an array to be duplicated, and ret is a new array obtained after deduplication. hash is e

I think we should first perform array deduplication when practicing ACM in nine degrees, because most of my work is written in PHP. Code In PHP, only one array_diff () function can be used to deduplicate arrays. However, in C language, I don't have any ready-made API functions that can be called by me, So I implemented Algorithm Array deduplication, but this algorithm has obvious defects. I will first dis

text line=new text (); Each row as a dataprotected void Map (Object key, Text value, Context context) throws IOException, interruptedexception{Line=value;Context.write (Line,new Text (",")); Key is unique, and as a data, the implementation of deduplication}}Static class Myreduce extends reducerprotected void reduce (Text key,iterableContext.write (key,new Text ("")); Map to reduce data has been finished data dedu