using hash

Rafael Dohms above the article let me surprise, can not help but translated down, at the same time supplemented part of the content. Spl,php Standards Library (standard PHP library), which has built-in components and interfaces from PHP 5.0, and is

[Discussion] I am a little bored with object-oriented thinking. I don't know what you think? I remember that I first came into contact with object-oriented programming language (java) and later made php. object-oriented features inherited

Project Application redis+php scenario, project redisphp scene Objective Some of the students in some cases say why can not use String type, string type can be fully implemented AH I suggest you look at my column, "Redis Advanced Usage," which

PHP provides a large number of built-in functions, allowing developers to easily process time, greatly improving work efficiency. Today, we will introduce some common PHP date and time functions as well as date and time processing. 9.1 Common date

Now the front-end framework is endless, greatly facilitates the development of our normal work, improve the efficiency of development, however, in the process of using the framework is necessary to understand some of the features of their own native

The memory table is a table in the memory. The size of the memory used can be calculated by using My. specify max_heap_table_size in cnf, for example, max_heap_table_size1024M. The memory table is different from the temporary table. The temporary

I. Use of SQL1. IN OperatorSQL statements written IN are easy to write and understand, which is suitable for modern software development.However, SQL statements using IN always have low performance. The following differences exist between SQL

(Monty gave a speech at OReillyOpenSourceConvention2000.) [compile and organize Yan Zi] I. what can and should we optimize? Hardware operating system software database SQL Server (setup and query) application programming interface (API) Application -

First, the efficiency of the algorithm comparisontitle: For arrays A and array B, two arrays of elements of the same content, but array A is already sorted, array B is unordered, for the median of the array, there are two sets of programs, compare

About the author Wang Dandan, software engineer of IBM China system and technology center, has been engaged in web system design and development since joining IBM in 2006. He has been using PHP for five

Introduction Determine whether a single link is cyclic and find the first cyclic node. Ideas [Determine whether a single link is cyclic]: If a single link is cyclic, the cyclic part is closed. This is like a track and field. When two people start to

This article mainly analyzes the implementation of hash tables in G ++ STL. In STL, apart from the map and set with the underlying storage structure of the red and black trees, there are also hash_map and hash_set implemented using hash tables. The

Sets types and operationsSet is a collection, which is an unordered set of the string type. Using hash table, the complexity of adding, deleting, and searching is zero (1 ). For a set, we can achieve the Union of communication and difference sets.

The suffix array is used to find the length of the longest overlapped string that can be repeated for at least K times. Of course, it can be done using hash. If the suffix array is used, check whether the number is greater than or equal to k After

OpenSSL provides eight symmetric encryption algorithms, 7 of which are group encryption algorithms, and the only stream encryption algorithm is RC4. These seven grouping encryption algorithms are AES, DES, Blowfish, CAST, IDEA, RC2, and RC5, all of

Preface Whether it's a blog or CSDN, we can see that many of our friends have not broken through a bottleneck in understanding and understanding the database. This bottleneck is often just a window, and you will see a new world. During project

This usually shows the wait related to the full table scan.When the database performs a full table scan, the data will be distributed (scattered) into the buffer cache based on performance considerations. If the wait event is significant,It may

Http://www.cnblogs.com/hysoka/articles/2363629.html   Foreword whether it's a blog or csdn, we can see that many of our friends have not broken through a bottleneck in understanding, understanding, or understanding the database. This bottleneck is

Technical Analysis of SQL statement Optimization Operator Optimization In Operator SQL statements written in are easy to write and understand, which is suitable for modern software development. However, SQL statements using in always have low

The most common method for parsing XML in Perl is to use XML: Dom and XML: simple. XML: The Dom is too large and the parsing result is a DOM tree, which is inconvenient to operate. For small and non-complex XML files, XML: Dom is a cool tool. Now it'