1 class diagram (1) UML arrow direction: From the child class to the parent class. You need to pass the extends keyword when defining a subclass, so the subclass must know the parent but the parent
Category: Software Design
Software design is based on the software requirements specification, designing the overall structure of the software system, dividing functional modules, determining the implementation algorithm of each module, and writing specific codes according to the functions determined in the requirements analysis stage to form a specific software design plan. Software design abstracts many things and problems, and abstracts them at different levels and angles. Decomposing a problem or thing and modularizing it makes it easy to solve the problem. The finer the decomposition, the greater the number of modules. Its side effect is to make the designer consider more coupling between modules
Simple version of time package
Encapsulate a timestamp
Main application: update blogs, comments, etc. with time at the end
function dateStr(d,sign){ if(!sign){ sign=’-‘ }else{ sign = sign; } let year = d.g
FLUTTER Tooltip Lightweight Operation Tips
Tooltip is a Widget inherited from StatefulWidget. It does not need to call up methods. When the user long presses Tooltip When the Widget is wrapped, the corresponding operation prompt will automa
OOP – When to support the inheritance of a combination
This question seems to be repetitive, but it is not the case. I searched on Google and the bus was unable to get conceptual clarity. There are many examples of animals and cars. However, I want to
Object-oriented JavaScript how to create a static class for constants
I decided to put all the constants in a concise class called constants, and wanted to use the dot operator to access its members.
So far , I have tried:
function Constants(){
Constants
Memory map file mappedbytebuffer
The DirectByteBuffer mentioned in the previous article inherits from MappedByteBuffer
The definition of MappedByteBuffer:
A direct byte buffer whose content is a memory-mapped region of
What general guidelines and best practices are needed when designing a database for an application?
My question is about database modeling. I tried to look for this question in other database design questions on SO, but haven’t found it yet, so I’m asking here:
What are the general guidelin
Object-oriented: reflection, double lower method
One. Reflection The concept of reflection was first proposed by Smith in 1982, and it mainly means that the program can access, detect and modify its own state Or an ability of behavior (introspect
Inheritance in OOP – Openerp (ODOO)
I am new to openERP and accepted an interview. Please explain the idea of different types of inheritance in openERP. I think there are 3 types in total. Please explain in a very simple way from t
Object-oriented (1)
The composition of the class Class is composed of 3 parts Class name: Class name Class attributes: A set of data Class method: allows operation method (behavior) definition class class class name: