Tag：primitive
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Time：2021-8-3
Introduction: vectorization engine has brought significant performance improvement to polardb-x expression calculation. introduce Polardb-x is a cloud native distributed database developed by Alibaba. It adopts a computing storage separation architecture, in which the computing node undertakes a large number of expression computing tasks. These expression calculations involve all aspects of SQL execution and have an […]
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Time：2020-11-30
Pythagoras theorem (Pythagorean theorem) indicates that the sum of the squares of the lengths of the two right angles of any right triangle is equal to the square of the length of the hypotenuse. It is expressed by formula a^2 + b^2 = c^2 The first question is whether there are infinitely many Pythagorean arrays […]
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Time：2020-11-21
Blockchain is a new technology based on cryptography, economics and network science. For the general public, cryptography is not an easy subject to get close to, and even among the three disciplines mentioned above, we feel that the subject has the most sense of distance. However, friends living in the blockchain circle will often hear […]
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Time：2020-11-7
Author: Xie Jingwei, known as “brother Dao” in the world, has been an it veteran for 20 years, an expert in data communication network, and a telecom network architect. At present, he is the development director of netwarps. Dao GE has many years of practical experience in the fields of operating system, network programming, high […]
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Time：2020-11-3
Introduction:How to do performance test? Either it is completed by coding, writing a bunch of scripts and discarding them when they are used up; or they are based on the platform and carried out in the process defined by the platform. For the latter, due to the complexity of target scenarios, such as deploying specific […]
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Time：2020-5-1
For multi process or multi thread access to shared data, it is often necessary to control the lock in the business layer to increase the brain load. Here, a general way is designed, and the lock operation is directly encapsulated in the data structure. Paste code directly #!/usr/bin/env python # encoding: utf-8 from multiprocessing import […]
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Time：2020-4-20
Preface Building automation refers to the electrical equipment in buildings, such as elevators, pumps, fans, air conditioners, etc. its main working nature is strong electric drive. Generally, these devices are in an open working state, that is to say, they do not form a closed loop. As long as the power supply is connected, the […]
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Time：2020-3-22
This is an example for users to learn on the official website written by the company’s God. At the beginning, I really didn’t know what it was doing. I just combined three shape elements together, and then I could rotate, enlarge and shrink the three figures at the same time. Click “animate” to let the […]
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Time：2020-3-3
Preface The Central Committee of the Communist Party of China and the State Council issued the outline of the Yangtze River Delta regional integration development plan (hereinafter referred to as the outline) in December this year, and issued a notice, requiring all departments in various regions to earnestly implement it in combination with the actual […]
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Time：2020-2-28
Catalogue 1. Overview… 2 2. Presentation information… 2 3. Ineuview configuration data interface… 2 4. Ineuview element binding data… 4 5. Ineuview element and text box configuration alert… 5 6. Customize the right-click menu for ineuview elements and text boxes… 6 1. Overview 2019 is coming to an end. We have laid a foundation for […]
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Time：2020-1-10
Original link: https://github.com/webpack/weTranslator: @ justjavac This example demonstrates scope hoisting in combination with code splitting. This is the example dependency graph: (solid line for synchronous import, dotted line for asynchronous import) exceptcjsAll modules except ECMAScript.cjsIs the commonjs module. Interestingly, placing all modules in a single scope will not work properly for the following reasons: Modularlazy, […]
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Time：2019-11-30
In this paper, we share the specific code of AutoCAD. Net forbidding the deletion of entities for your reference. The specific content is as follows Forbidding elements from being deleted by users can be implemented through objectoverride. The following codes: 1. Command adderaseoverrule to create two elements and prohibit them from being deleted.2. Command removeeraseoverrule […]
