There are four roles as follows. The attributes and behaviors of these roles are
Stock investors: name, age, study stock speculation, speak English
Fund Investor: name, age, study and speculation
Stock Manager: name, age, teaching stock trading, speaking English
Fund manager: name, age, teaching and speculation base
Posted by ballhogjoni on Tue, 09 Aug 2022 21:47:12 +0300
Characteristics of encapsulation: data can only be accessed through specified methods.Hide the instance details of the class to facilitate modification and implementation.Specific practical steps of packaging
Modify the visibility of attributes to restrict access to attributes, which is generally set to private.Create a pa ...
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I love python and look forward to growing up with you!!
Purpose: use uiautomation to get wechat friends and store them in txt files.
2, Specific steps
Enter address book management
Posted by lizzyd on Tue, 09 Aug 2022 13:03:39 +0300
Introduction: Using the networking function of ESP32, a serial port module of WiFi UDP to Zigbee is constructed. This module only sends UDP instructions to Zigbee's network, which replaces the original function. Note that the network address of ESP32 is 192.168.0.114. How can I get the IP address of ESP32? You can intervene in the 192 ...
Posted by roninblade on Tue, 09 Aug 2022 12:20:46 +0300
1, Ask questions with Lombok
1. Open settings (shortcut key: ctrl+alt+s) in idea, search plugin, search lombok in plugins, and install
2. Introduce lombok dependencies into the project
Posted by jf3000 on Tue, 09 Aug 2022 11:59:23 +0300
Text starts here~.tsx extensionIn order to resolve Cannot find name errors in React TypeScript, we need to use the.tsx extension when using JSX files, in your tsconfig. Set JSX to react-jsx in the JSON file and make sure that all necessary @types packages are installed for your application.Below is an example of an error in a file named App.ts. ...
Posted by jackread on Sun, 07 Aug 2022 21:57:26 +0300
1. Font Properties
1.1 Font Size
1.2 Font Style
1.3 Set line height
1.4 Font Tilt
Compound Writing of 1.5 font
2. Text Attributes
2.1 Font Color
2.2 Retrieve or set the case of text in an object
2.3 Text Alignment
2.4 Text Modification
2.5 first line indentation
2.6 Word Spacing
2.7 Word Spacing
3. List Attributes
Posted by Matt Kindig on Sun, 07 Aug 2022 21:42:26 +0300
Monotonic queue optimization DP
Maximum subsequence sum
Enter a length of
An integer sequence of n, from which a length of no more than
Posted by FlashbackJon on Sun, 07 Aug 2022 21:36:46 +0300
Database optimization scheme
Index failure, insufficient use of index: index establishmentToo many JOIN (design defects or unavoidable requirements) associated queries: SQL optimizationToo much data: sub database and sub tableServer tuning / optimization and various parameter settings (buffer, number of threads, etc.): adjust my.cnf
Posted by tanita on Sat, 06 Aug 2022 21:43:39 +0300
1, What is exception handling Exception handling is also called exception handling. There are two purposes to deal with exceptions in the program, one is to find the exceptions in the program, and the other is to operate the exceptions relatively or notify the programmer to modify them. Using the try catch statement can accomplish these two pur ...
Posted by bothwell on Sat, 06 Aug 2022 21:26:11 +0300