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catalogue preface Question 1: Chinese display of matplotlib drawing Question 2: the X-axis time of the graph always shows 1970 1. Problem description 2. Causes of problems 3. Solutions Question 3. Difference of synthetic square wave caused by one bracket 1. Problem description 2. Causes of problems 3. Problem analysis Qu ...

First, let's talk about my version information Operating system MacOS Big Bur 11.2.2 Mysql 8.0.24 Note: I installed it through the official dmg package, not through homebrew. If it is a problem in homebrew installation, it can also be used as a reference. Current date: April 21, 2021 If you want to directly test the results, you can ju ...

Day4: enter, if, switch When implementing branch judgment, a good habit is to put the judgment with high matching success rate in front, which can improve efficiencyIn the expression judgment, we try to use the determined value to judge with the uncertain value Execution process in the program: Sequencing: starting from the main method ...

MacOS java development 2 variables and constants constant Constants: data that cannot be changed Data, keywords and identifiers are all components of JAVA programs Constant category: Integer 100, 23, 1 Decimals 3.14, 21.231 Character - enclosed in single quotation marks, can only write one character and must have a value String - enclos ...

1, Foreword Cross platform really spent a lot of energy to start from Qt4 7 compatible to Qt6 2 and subsequent versions have lost a lot of hair, and only a few hairs are left. Hey, maybe this is the life of programmers. I have written Qt programs for so many years and prefer to support multiple Qt versions, especially for supporting any Qt ver ...

1, Topology diagram: 2, Basic configuration: 1: Create VLAN <Huawei>display vlan --- see VLAN information [Huawei]vlan 2 --- establish VLAN [Huawei-vlan2]q [Huawei]undo vlan 2 --- delete VLAN [Huawei]vlan batch 2 to 100 --- Batch creation VLAN [Huawei]vlan batch 2 to 100 --- Batch delete VLAN <Huawei>undo terminal monitor --- ...

Environmental preparation OS: MacOSJDK: java version "1.8.0_231"idea: 2019.3.4Gradle: 5.6.4 1. Download Spring source code 1.1 method 1-Github official https://github.com/spring-projects/spring-framework Recommendations: Select the release version to downloadThe network speed is too slow. Select mode 2 1.2 mode 2-Gitee Code cloud acce ...

0. Introduction The last issue introduced mac pro M1(ARM) installation: VMWare Fusion and linux(centos7/ubantu) In this issue, let's see how to install elasticsearch and kibana on m1 1. Install es and kibana based on centos How to install centos virtual machine on m1 can refer to the above blog 1.1 download This is based on the demonstrati ...

preface Previous installation and deployment Rainbond No way can bypass the construction of Kubernetes cluster. Whether it is used as a development environment or for production delivery, the deployment process is very dependent on the server or virtual machine. This sets a high threshold in the process of experiencing the rainbow cloud native ...

Download Python 3 https://www.python.org/downloads/mac-osx/ Modify environment variables Modify ~ /. Under the user root directory bash_profile file, input at the terminal: vi ~/.bash_profile Add a new row PATH="/Library/Frameworks/Python.framework/Versions/3.9/bin:${PATH}" export PATH alias python="/Library/Frameworks/Python.framework ...