Others

yii2.0 query database to reduce memory usage1. Query result conversion Array (object in memory occupies more than array high where () plus->asarray () to convert the object to an arrays)$results = Test::find ()->where ([' Between ', ' ID ',])->all ()

This article environment: python3.5 Ubuntu 16.04 Third party libraries: Jieba Documents sent to Github:https://github.com/w392807287/angelo_tools.gitSimhash IntroductionNot long to write the graduation thesis, it is

BigDecimal How to useBlog Category: Java Basics The Bigdecimalmultiplyadddivide BigDecimal consists of an integer non-scaling value of arbitrary precision and a 32-bit integer scale (scales). If zero or positive, the scale is the number

In the development process of QT, often use the form (qtablewidget) This control, the data on the net many, but is the most basic, some more frequently encountered problem also said not very clear. So, here's a summary today!The following is a

InstallationThe first thing to add in Composer.json:"Zizaco/entrust": "5.2.x-dev"Then run composer install or composer updateIn the provider array of config.php, add:Zizaco\entrust\entrustserviceprovider::class,In the alias array of config.php, add:'

Biometric identification technology is the use of human body inherent physiological characteristics (such as fingerprints, face, red film, etc.) and behavioral characteristics (such as handwriting, sound, gait, etc.) to conduct personal

Virtual reality Technology is one of the hottest technology this year, many industries are grafting VR function, in which the tourism industry also has the advantage. vr+ Travel, can let you stay at home can feel pure beauty of places of interest.

2 using OVF file interaction in workstation and vsphereYou can export a virtual machine to an OVF file in workstation or vsphere, and then interact with the virtual machine in vsphere or workstation by importing the OVF file. When using OVF files to

In the rapid development of electronic technology today, file format conversion is not a rare thing, because now are electronic office, there are many file formats, but different occasions need different formats, so often need to do file format

Most Linux distributions contain a dictionary file, along with a aspell tool that is useful for spell checking1, the directory/usr/share/dict/contains some dictionary files, "dictionary file" is a dictionary word list contains a text file, you can

1.StarUML STARUML is an open source UML project that can develop a fast, flexible, scalable, versatile and free UML/MDA platform. This project runs on top of the Win32 platform. The goal of the STARUML project is to be a replacement for

Watch Yu Qiao The video of the teacher, referring to the above questions, carefully search under the research:It is forbidden to use the counter-divided signal as the clock of other modules, but to change the clock to enable the way. Otherwise, the

If you want to copy files to this computer on a remote server, it is common practice to use FTP, that is, to assume the FTP service on theremote server , and then connect to the server with the FTP software on the computer , upload / Download the

Virtual reality is probably the highest known among the three technology types, whether it's Oculus Rift, HTC Vive, or Sony PlayStation VR, which has been on the headlines for a while.VR devices are basically a head-mounted display that creates a

Example:1, Ping module all CCE Group host survival rate[[email protected] ~]# ansible cce-m Ping2. Execute commands with command[Email protected] ~]# ansible cce-m command-a ' cat/etc/redhat-release '3. Execute commands using shell module[Email

Objective:Almost all applications on a computer use string data as the processing object, however, the hardware structure of the computer we are using today is primarily reflective of the need for numerical computation, so it is much more complex to

We use elk to do log analysis system, Elasticsearch1.7.3 run for nearly a year, has recently upgraded a cluster to ES5.1.1, but encountered more problems. So upgrading another cluster to the community recommended a more stable 2.4.2. In order to

ObjectiveWhat is Hadoop?In the Encyclopedia: "Hadoop is a distributed system infrastructure developed by the Apache Foundation." Users can develop distributed programs without knowing the underlying details of the distribution. Take advantage of the

Business requirements Intermediary practitioners to publish housing listings information, request to be able to upload the property image, the listing control in 8 photos. During the release process, in order to avoid user error,

Object properties:1,Private Modified properties: Only within this class access, classification and external access (completely private)2.fileprivate Modified properties: Accessible in this class and classification, external inaccessible (partially