vsan deduplication

Php two-dimensional array deduplicationMethod 1: Dimensionality Reduction and deduplication If (! $ IsPidArrKey) {// Dimensionality Reduction deduplication $ temp = array (); foreach ($ tmp as $ k = >$ v) {$ v = implode (',', $ v); $ temp [] = $ v;} $ temp = array_unique ($ temp); foreach ($ temp as $ k => $ v) {$ temp [$ k] = explode (",", $ v) ;}$ tmp = $ temp ;} Method 2: remove duplicates using the thir

This example describes how to merge multiple array deduplication algorithms implemented by JS. We will share this with you for your reference. The details are as follows:? 1234567891011121314 var arr1 = ['a','b'];var arr2 = ['a','c','d'];var arr3 = [1,'d',undefined,true,null];// Merge two arrays to remove duplicatesvar concat_ = function(arr1,arr2){// Do not directly use var arr = arr1. In this way, arr is only a reference of arr1, and mod

Today, my friend asked a particularly tangled question: in a database table, we need to repeat a field in the table and sort the remaining data by another field, Today, my friend asked a particularly tangled question: in a database table, we need to repeat a field in the table and sort the remaining data by another field, Today, my friend asked a particularly tangled question: In a table in the database, the table duplicates a field in the table and sorts the remaining data according to ano

t group by gcmc, gkrq havingCount (*)> = 1 order by GKRQ)Select * from gczbxx_zhao where viewid in (select max (viewid) from gczbxx_zhao groupGcmc) order by gkrq desc --- this is feasible..One question says: the efficiency of distinct deduplication is very low. I saw this article on the Internet as if it was very efficient to use group by having?In a test, I have a product table with 0.26 million records. Only the product number is indexed and the br

The group by statement can deduplicate a column.Directly run the preceding statement: select io_dev_id from io_info where (TID = 1 AND host_name = 'yang1') group by 1; deduplication BY io_dev_id. P: The difference between order by and distinct is that group by is used to select order by Based on the column. distinct is similar to group by, but it can only be placed behind select, the front of the filtered field. For example, select distinct a, B, c fr

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Today, my friend asked a particularly tangled question: In a table in the database, the table duplicates a field in the table and sorts the remaining data according to another field, Create a table as follows: Create table TEST_DISTINCT (ID integer not null,NAME varchar (20) not null); Insert into TEST_DISTINCT values (0, 'A ');Insert into TEST_DISTINCT values (1, 'bb ');Insert into TEST_DISTINCT values (2, 'cc ');Insert into TEST_DISTINCT values (3, 'dd ');Insert into TEST_DISTINCT values (4, '

gcmc, gkrq having Count (*)> = 1 order by GKRQ) Select * from gczbxx_zhao where viewid in (select max (viewid) from gczbxx_zhao group Gcmc) order by gkrq desc --- this is feasible. One question says: the efficiency of distinct deduplication is very low. I saw this article on the Internet as if it was very efficient to use group by having? In a test, I have a product table with 0.26 million records. Only the product number is indexed and the brand nam

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--># Include Using namespace STD; // Reconnection deduplication Algorithm Void trytolink (char * Str) { Char * pcur = STR; // Char * POS [20] = {0 }; Char ** Pos = (char **) malloc (sizeof (char *) * (strlen (STR) + 1 )); Memset (Pos, '\ 0', strlen (STR) + 1 ); // Char * pnodes = (char *) nodes; Bool state = 0; Size_t Index = 0; // Int J = 0; If (! (* Pcur )

Php 3D array deduplication (sample code ). Suppose it is called array $ my_array; copy the code as follows: create an empty array. $ tmp_arrayarray (); $ new_arrayarray (); 1. loop all rows. ($ val is a row) suppose it is an array $ my_array; The code is as follows: // Create an empty array.$ Tmp_array = array (); $ New_array = array (); // 1. loop all rows. ($ val is a row)Foreach ($ my_array as $ k => $ val ){ $ Hash = md5 (json_encode ($ va

", "list remove finish." Size now is 50! "); Jsondata= Utilshelper.beanconverttojson (NewMessage (0, "Success", list)); }Else{LOG.D ("Cachethread", "list size is 0!"); } //save JSON characters locally so you can browse offline without a network if(Jsondata! =NULL) {utilshelper.savejsontextinlocalfile (jsondata); }Else{LOG.D ("Cachethread", "Jsondata is NULL!!"); } } }This will only intercept up to 50 joke messages to avoid slow read and write p

-15 8765487654 15-1Remove the elements from the original list in a linked list and put them in a new list.#include #defineMAXN 10000+50#defineMAXV 100000+50using namespacestd;intAbsoluteintx);BOOLVIS[MAXN];//pairvectorint,int> >Resulting;vectorint,int> >removed;//Pairpairint,int>ARR[MAXV];intMain () {memset (Vis,false,sizeof(VIS)); intstartaddress, num; scanf ("%d%d", startaddress, num); for(inti =0; i i) { intCuraddress, Val, nextaddress; scanf ("%d%d%d", curaddress, val, nextaddress);

The array_unique () function of PHP allows you to pass an array, remove duplicate values, and return an array with unique values, this article describes how to implement PHP array de-duplication quickly. For more information, see this article. The array_unique () function of PHP allows you to pass an array, remove duplicate values, and return an array with unique values. This function works well in most cases. However, if you try to use the array_unique () function in a large array, it will ru

Simply remove text duplication .? Phperror_reporting (0); echon. enter the file to be sorted :. n; $ dictrim (fgets (STDIN); $ filefile ($ dic); $ arraypreg_replace ($ s * $) | (^ s * ^) m ,, $ file); Removes empty lines $ new_arraya Error_reporting (0 ); Echo "\ n". "Enter the file to be sorted:". "\ n "; $ Dic = trim (fgets (STDIN )); $ File = file ($ dic ); $ Array = preg_replace ('/($ \ s * $) | (^ \ s * ^)/M', '', $ file); // clear empty rows $ New_array = array_values (array_unique ($ arr

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