✔️ C#: Replace if statement with Null Conditional Operator

✔️ C#: Replace if statement with Null Conditional Operator

✳️The null conditional operator, also known as the null propagation operator or the safe navigation operator, is a feature introduced in C# 6.0 that allows you to write cleaner and more concise code when dealing with potentially null reference types.

✳️The null conditional operator is represented by a question mark followed by a period (?.) and is used to access members or invoke methods on an object that may be null. If the object is null, the expression returns null instead of throwing a null reference exception.

✳️Checking for null is probably what you do quite often, for example, to prevent a null reference exception when invoking properties. Using if-statements for numerous null checking makes code cumbersome and lengthy.

✳️The null conditional operator allows checking one or more expressions for null in a call chain, which is called null propagation. Such a notation can be written in a single line whereas a number of if-else statements typically occupy many lines.


💡In the comments I attached an example in JavaScript: Replace if statement with Optional chaining.


✳️ Can you make the example cleaner ? Do you have any other suggestions?

Thank you for reading 😊

✔️ Avoid else after return

✔️ Avoid else after return

✳️ This principle is a guideline in clean code development that suggests avoiding the use of an else statement immediately after a return statement in a function or method.

✳️ When a return statement is encountered in a function, it immediately exits the function and returns control to the calling code. Any code following the return statement within the same block will not be executed. In many cases, including an else statement after a return is redundant and can be safely removed.

✳️ Following the "Avoid else after return" principle helps in writing cleaner, more maintainable code by simplifying control flow and improving code readability.

✳️ In the attached image, an example of how to apply this principle.

❌ Bad: Violates the "Avoid else after return" principle.

✔️ Good: Refactoring the code, the else clause have been eliminated.

💡 Short: The conditional operator (? :) is used to directly return either "Pass" or "Fail" based on the condition. This eliminates the need for an if-else statement.

✔️ Function names should say what they do

✔️ Function names should say what they do

Function names should be clear and descriptive, providing a clear indication of what the function does. This makes it easier for other developers to understand the purpose of the function without having to read through the implementation details.

This is important because function names serve as a form of documentation and make it easier for other developers to understand the purpose and behavior of the code.

Following this principle helps make your code more readable, understandable, and maintainable.

Thank you for reading 😊

✔️ Use searchable names

We will read more code than we will ever write. It's important that the code we do write must be readable and searchable. By not naming variables that end up being meaningful for understanding our program, we hurt our readers. Make your names searchable.

Using searchable names means that variable, function, and class names should be clear and unambiguous so that other developers can easily understand what they do.

Thank you for reading 😊

Clean Code ✅

Use meaningful and pronounceable variable names:

The name should reflect what it does and give context. It's essential to choose names that are clear, descriptive, and easy to understand.

Thank you 😊

Naming conventions refer to the guidelines or rules that developers follow when naming variables, functions, classes, and other elements in their code. The purpose of these conventions is to make the code more readable, maintainable, and self-documenting.

There are several commonly used naming conventions in programming languages, I will mention the three most popular:

1- Pascal Case: The first letter of every word is capitalized, with no spaces or underscores. It is commonly used in C++, C#, Visual Basic.
Examples: FirstName, LastName, NumberOfDevices.

2- Camel Case: The first letter of the first word is lowercase, and the first letter of subsequent words is uppercase, with no spaces or underscores. It is commonly used in Java and JavaScript.
Examples: firstName, lastName, numberOfDevices.

3- Snake Case: Words are separated by underscores, and all letters are lowercase. It is commonly used in Python and Ruby.
Examples: first_name, last_name, number_of_devices.

Thank you for reading 😊

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Type Casting in Java:

In Java, type casting is a method or process that converts a data type into another data type in both ways manually and automatically. The automatic conversion is done by the compiler and manual conversion performed by the programmer.
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import java.util.Scanner;
public class retainStore {

public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner sc=new Scanner(System.in);
System.out.println("Enter the Customer ID for the Purchase is");
int customerid=sc.nextInt();
System.out.println("Enter the Bill id for the Purchase is");
int billid=sc.nextInt();

int discount=0;
System.out.println("Enter the Bill Amount for the Purchase is");
double billAmount=sc.nextDouble();

//199.99 2% | 210.00 5%
if(billAmount>0 && billAmount>=199.99 && billAmount<=210.00)
{
discount=2;
}
else if(billAmount>0 && billAmount>=210.00)
{
discount=5;
}
else
{
discount=0;
}

double discountedBillAmount= billAmount-billAmount *((double)discount/100);
System.out.println("Customer ID="+customerid);
System.out.println("Bill ID="+billid);
System.out.println("Discount="+discount);
System.out.println("Bill Amount="+billAmount);
System.out.println("Discounted BillAmount="+discountedBillAmount);

}
}

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