deduplication rate

Js array deduplication method summary, js array Summary Three methods Use indexOf to determine the new array Similar indexOf is actually used in underscore. js. // Input the Array function unique1 (arr) {var tmpArr = []; for (var I = 0; I Use indexOf to determine the old Array Function unique2 (arr) {var tmpArr = []; // result array for (var I = 0; I Search by hash The implementation of JS objects is the feature of hash tables. Function unique3 (arr

Copy codeThe Code is as follows:/** Array element deduplication*/If (typeof Array. prototype. distinct! = "Function "){Array. prototype. distinct = function (){This. sort ();For (var I = 0; I If ($. isPlainObject (this [I]) $. isPlainObject (this [I + 1]) {If (o2o (this [I], this [I + 1]) {This. splice (I, 1 );}} Else if ($. isArray (this [I]) $. isArray (this [I + 1]) {If (a2a (this [I], this [I + 1]) {This. splice (I, 1 );}} Else if (this [I] ===

This article mainly introduces php bubble sorting, fast sorting, fast searching, and two-dimensional array deduplication instance sharing. For more information, see the next section. The code is as follows: // Bubble sort Function bubble_sort ($ array) { $ Count = count ($ array ); If ($ count Return false; } For ($ I = 0; $ I For ($ j = 0; $ j If ($ array [$ j]> $ array [$ j + 1]) { $ Temp = $ array [$ j]; $ Array [$ j] = $ array [$ j + 1]; $ Array

Small example of array deduplication in php for beginners The code is as follows: Function 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 ); Return $ arr; } $ Aa = array ( Array ('id' => 123, 'name' => 'Zhang San '), Array ('id' => 123, 'name' => 'Lily '), Array ('id' => 124, 'name

#region DataTable to Heavy/// The above is the C # DataTable data deduplication content, more relevant content please pay attention to topic.alibabacloud.com (www.php.cn)! 

This article mainly introduces php array deduplication instances and analysis. For more information, see. Repeated items in one-dimensional array: Use the array_unique function. use the following example: The code is as follows: $ Aa = array ("apple", "banana", "pear", "apple", "wail", "watermalon ");$ Bb = array_unique ($ aa );Print_r ($ bb );?>The result is as follows: Array ([0] => apple [1] => banana [2] => pear [4] => wail [5] => watermalon ).

There are two arrays with the same length. how can we keep them consistent after deduplication. For example $ T1 = Array ([0] => Nanchang [1] => Nanchang [2] => Ganzhou [3] => Jiujiang [4] => Ganzhou [5] => jiujiang) $ T2 = Array ([0] => 17:48:33 [1] => 12:48:42 [2] => 17:48:23 [3] => 08:40:03 [4] => 10:28:22 [5] => 11:28:13) Currently, both $ t1 and $ t2 are of the same length. They also have a corresponding relationship. That is t1 [0] and t2 [0].

C # The difference set, Union set, intersection, and deduplication of linq ], Using System. linq; List

Python list deduplication, Python list Boring statistics on how many methods are available to deduplicate the list. 1. Set list(set(alist)) To maintain the order: import randomif __name__=='__main__': a=[random.randint(0,10) for i in xrange(10)] b=list(set(a)) b.sort(key=a.index) 2. Dictionary Most of them use the hash table feature {}.fromkeys(alist).keys() Or manually write: import randomif __name__=='__main__': a=[random.randint(0,10) f

Example of deduplication of php Arrays This article mainly introduces the example of de-duplicated data in php arrays. Sometimes the obtained php arrays always contain duplicate values. You can use the following method to remove duplicate data. Repeated data starting with a number is as follows: The Code is as follows: Array ( [0] = gt; 100 [K1] = gt; 100 [1] => 2123. [K2] = gt; 2123) This method can remove the value of the number as

: This article mainly introduces php array deduplication. For more information about PHP tutorials, see. One-dimensional array $aa=array("apple","banana","pear","apple","wail","watermalon"); $bb=array_unique($aa); print_r($bb);//Array ( [0] => apple [1] => banana [2] => pear [4] => wail [5] => watermalon Two-dimensional array 1) because the values of one-click names cannot be repeated, duplicate items are deleted. $ Aa = array ('id' => 123, 'name' =>

Php bubble sorting, quick sorting, quick search, and two-dimensional array deduplication instance sharing. I. Code of the bubble sort copy code: functionbubble_sort ($ array) {$ countcount ($ array); if ($ count0) {returnfalse;} for ($ i0; $ I $ count; $ I ++) {for ($ j0; 1. Bubble sorting The code is as follows: // Bubble sortFunction bubble_sort ($ array){$ Count = count ($ array );If ($ count Return false;}For ($ I = 0; $ I For ($ j = 0; $ j If (

Js deduplication and js merge 1. deduplicationFor (var q = 0; q } If (! IsExist) {s. push (matchCode) ;}} 3. group var map ={}, dest = []; for (var I = 0; I

, original)) {Servlets.writehtml (Response, "true");Return}Check if the database has duplicate namesBoolean exist = service.emailexist (email);if (!exist) {Servlets.writehtml (Response, "true");} else {Servlets.writehtml (response, "false");}*/}Yuan Sheng Backstage:protected void doget (HttpServletRequest request, httpservletresponse response) throws Servletexception, IOException {Response.setcontenttype ("Text/html:charset=utf-8");Response.setcharacterencoding ("Utf-8");PrintWriter out= Respons

. Rows.Add (_DR. ItemArray); Console.WriteLine ("--------------------table with duplicate data originally----------------------"); _dt. AsEnumerable (). ToList (). ForEach (M={Console.WriteLine (m["ID"]. ToString () +" "+ m["name"]. ToString () +" "+ m["Address"]. ToString ()); }); Console.WriteLine ("--------------------Remove the duplicate table----------------------"); var_compresult = _dt. AsEnumerable (). Distinct (NewDatatablerowcompare ()); DataTabl

Array deduplication is difficult to calculate. there is an array that needs to be deduplicated. the format of the array is discussed online. Reply to discussion (solution) Paste the sample array output by var_export. the basis for not discussing is not discussed. In fact, it is very simple. you only need to press the cluster key to cluster. Paste the sample array output by var_export. the basis for not discussing is not discussed. In fact, it

,), '2' => array ('name' => 'James ', 'age' => 30 ,), 'New' => array ('name' => 'kube ', 'age' => 37 ,), 'list' => array ('name' => 'kube ', 'age' => 27,),); printf ("Before tranform the array:"); // Output the original array print_r ($ arr); echo""; Function more_array_unique ($ arr = array () {foreach ($ arr [0] as $ k = >$ v) {$ arr_inner_key [] = $ k; // record the key value of the inner array of the two-dimensional array in the one-dimensional array} foreach ($ arras $ k => $ v) {$ v = join

Simple question.#include #include#include#include#include#include#include#includeusing namespacestd;Const intmaxn=100000+Ten;intRoot,n;structnode{intId,val,nx;} TMP[MAXN],S[MAXN];int inch[MAXN];intFLAG[MAXN];intIDX[MAXN];inttot=0; Vectorint>G[MAXN];intMain () {memset (inch,0,sizeof inch); memset (Flag,0,sizeofflag); scanf ("%d%d",root,N); for(intI=1; i) {scanf ("%d%d%d",tmp[i].id,tmp[i].val,tmp[i].nx); inch[tmp[i].id]=i; } intp=root,sz=0; while(1) { if(p==-1) Break; S[sz++]=tmp[in

1. Save All accessed URLs in the database2. Save the accessed URL in the memory and query the URL at the O (1) cost.1000000000 * 2byte * 50 characters/1024/1024/1024 ≈ 9G3. the URL is hashed by MD5 and then saved to the memory (the method used by scrapy)4. Use the bitmap method to map the accessed URL to a certain location using the hash function.5. The bloomfilter method improves bitmap and multiple hash functions reduce conflicts.Crawler deduplication