Code refactoring is to improve existing code without changing external functions. It is one of the core parts of programming and cannot be ignored. Otherwise, you won't get a better version of the code. Code refactoring can enhance the codereadability、MaintainabilityandScalability. It is also designed to improveperformanceAnd the developersWork efficiency. Today, we will explore some tips that can help you refactor your code better.
How to refactor
Before looking for refactoring techniques, let's see how to integrate code refactoring into the encoding process. The following suggestions can be used for this purpose:
- Specially allocate time for refactoring code.
- Decompose larger reconstruction problems into smaller problems for management.
- Try to involve the entire team in the reconstruction process.
- Use automation tools that help you find common refactoring errors.
Now, let's start with the technology used for reconstruction.
Technology 1: Extraction method
This method involves converting a block of code into a separate method/function. This is done to improve the structure and readability of the code. It is achieved by extracting long and complex blocks of code into smaller, more manageable methods. To use this technique, we first need to find a complex task-specific code block. Then we extract the code in it and put it into a new method. Also, make sure to specify a method withName of meaning。
Example
Before refactoring:
function calculateInvoiceTotal(items) {
let total = 0;
for (let i = 0; i < ; i++) {
const item = items[i];
if (! || !) {
('Invalid item', item);
continue;
}
const itemTotal = * ;
total += itemTotal;
}
return total;
}After reconstruction:
function calculateInvoiceTotal(items) {
let total = 0;
for (let i = 0; i < ; i++) {
const item = items[i];
const itemTotal = calculateItemTotal(item);
total += itemTotal;
}
return total;
}
function calculateItemTotal(item) {
if (! || !) {
('Invalid item', item);
return 0;
}
return * ;
}
You see, we propose the code that calculates the total price of the product in the loop as a separate function. Is the first function simple and easy to read?
Technology 2: Replace numbers with symbolic constants
This trick is to write cleaner and more readable code. Magic numbers refer to hard-coded values. Writing hard-coded numbers can confuse others because their purpose is not defined. Converting hard-coded values to variables with meaningful names will certainly help others understand it. Additionally, you can add comments for further explanation. It can also help debug and reduce the risk of future errors.
Example
Before refactoring:
if (temperature > 32) {
// Do something if temperature is above freezing
}After reconstruction:
const int FREEZING_POINT = 32;
if (temperature > FREEZING_POINT) {
// Do something if temperature is above freezing
}Technology 3: Merge duplicate code
Duplicate or the same code may appear in code in different locations. This code does not need to be exactly the same, but it can perform similar tasks or extend further from the original code. Duplicate code can cause several problems: including increased maintenance costs, difficulty in changing the code base, and higher risk of introducing errors. When refactoring your code, you must be careful about the duplicate code. When such code is found, one way to deal with it is to convert such code into a single reusable function/method.
Example
Before refactoring
function calculateTotal(numbers) {
let total = 0;
for (let i = 0; i < ; i++) {
total += numbers[i];
}
return total;
}
function calculateAverage(numbers) {
let total = 0;
for (let i = 0; i < ; i++) {
total += numbers[i];
}
const average = total / ;
return average;
}
After reconstruction:
function calculateSum(numbers) {
let total = 0;
for (let i = 0; i < ; i++) {
total += numbers[i];
}
return total;
}
function calculateTotal(numbers) {
return calculateSum(numbers);
}
function calculateAverage(numbers) {
const total = calculateSum(numbers);
const average = total / ;
return average;
}
In the previous code example, we sum and then average again. After reconstruction, we replace it with a function that provides the sum of both.
in conclusion
Refactoring is an essential practice for any developer who wants to improve code quality, performance, and maintainability. By spending time analyzing and optimizing your code, you can eliminate redundancy, reduce complexity, and create a more efficient, scalable application. By constantly reviewing and improving your code, you can create a more robust and resilient application. I hope this article helps you understand some refactoring techniques.
This is the end of this article about the sharing of practical reconstruction technology in the 3 Go languages. For more related Go reconstruction content, please search for my previous articles or continue browsing the related articles below. I hope everyone will support me in the future!