deduplication rate

Php array element deduplication 1. remove duplicates using the array_unique method To deduplicate array elements, we usually use the array_unique method. this method can be used to deduplicate the elements in the array. 123456 Output: Array( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 [6] => 7 [7] => 8 [8] => 9)123456789101112 After deduplication, the key values a

// 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

In the field of electronic communication,Baud Rate (Baudrate) that isModulation rateIndicates the unit time after the signal is modulated.PorterNumber, that is, the number of times the carrier parameter changes within the unit time. It is a measure of the symbolic transmission rate. Generally, the unit is "Porter per second" (BPS, 1 port transfers 1 Symbol per second (may contain multiple bits ). The

Welcome to the Linux community forum, and interact with 2 million technical staff to enter the GROUPBY statement to implement deduplication query for a certain column. Directly run the preceding statement: selectio_dev_idfromio_infowhere (Tyang1) GROUPBY1; deduplication by io_dev_id. P: add it with ORDERBY and disti. Welcome to the Linux community forum and interact with 2 million technical staff> enter the

Research on Big Data de-duplication in hive inventory table: store incremental table: inre field: 1. p_key remove duplicate primary key 2. w_sort sort by 3.info other information method 1 (unionall + row_number () over): insertoverwritetablelimao_storeselectp_key, sort_wordfrom (selecttmp1. *, row_num Research on Big Data de-duplication in hive inventory table: store incremental table: inre field: 1. p_key remove duplicate primary key 2. w_sort sorting is based on 3. other info information metho

During project development, arrays often contain a lot of repeated content, that is, dirty data removal operations. This article focuses on several methods of array deduplication. For more information, see. 1.According to the principle that keys in js objects are not repeated, the method of removing duplicates from arrays is conceived. The most common thinking is as follows: The Code is as follows: Function distinctArray (arr ){Var obj = {}, temp =

Select * From dc_restaurants; 31 Select distinct (restaurant_name), ID from dc_restaurants; 31 (deduplication will be performed based on the ID and specified ant_name) Select distinct (restaurant_name), ID from dc_restaurantsGroup by comment ant_name; 17 Select distinct ant_name, ID from dc_restaurantsGroup by comment ant_name; 17 -- Deduplication based on a field: 1. Group by (do not pay attention

Summary of deduplication methods for javascript Arrays Summary of deduplication methods for javascript Arrays Array deduplication is a common requirement. We will temporarily consider repeated arrays of the same type. It mainly aims to clarify the ideas and consider the performance. The following methods are available on the Internet. Here is a brief summary. Sum

Three methods and code examples for removing the deduplication of JavaScript Arrays This article mainly introduces three methods and code examples for de-duplicating JavaScript arrays. This article provides the instance Code directly. For more information, see There are many methods to deduplicate arrays. it is unclear which one is the best. So I tested the effect and performance of array deduplication. Tes

　　What is the user retention rate? In the Internet industry, users begin to use the application within a certain period of time, and after a period of time, continue to use the application is considered to be retained; This part of the user accounted for the current percentage of new users is the retention rate, according to every 1 units of time (example days, weeks, months) to be counted. As the name sug

Original article published on 21:39:48In the previous article . Test Coverage rate can help us check test quality and test case efficiency. If you are interested, read Test Coverage 2-what is the purpose of test coverage? I personally think that the test coverage rate is more and less useful. I recently saw an article on the Internet discussing the question "does the test require 100% coverage ?" QuiltRepr

First of all, we need to understand the low rate of conversion of a website under what conditions, small knitting to the situation mainly divided into the tourist time and the rate of jump out of our site, Below we can be made up of a website www.6hoo.com data screenshot can be seen, small part of the site to stay the longest length of 120.38S, the shortest 21.42S, see this data a lot of friends may feel go

I searched for the exchange rate application on the marketplace and found that most of them can only be converted to the other at the same time. Therefore, I wrote the currencyexchanger that can convert multiple currencies at the same time. This article will serve as the release page of currency exchanger. V1.6 update: -Added: each live tile supports conversion of up to four currencies.-Added: mobile phone shaking detection is supported to quickly upd

sound card perspective, it has three basic functions: first, the music synthesis and pronunciation function; the second is the mixer and DSP functions. The third is the input and output functions of analog sound signals. Pchifi uses only half of the third function: analog signal output. from a more detailed point of view, the output analog signal is divided into x.0 and X.1, the former is generally 2.0, used to listen to music, which is also the channel used by hifi; the latter is generally 2.1

Original article published on 22:35:43 In the previous article Article We introduced For example, we will reveal the issues of requirement coverage, statement coverage, and conditional coverage of branch coverage. In this article, we will mainly explain why we should try every means to find "test coverage ". (For more information about the previous article, see Test Coverage Rate-test coverage rate Classi

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'