Naming Conventions | Mr Yenagandula

Naming Conventions In Detail

• The main intention of naming convention in javascript to write readable code.
• Readable code is like understandble code. Meaning , if any one saw your code it is easy to understand and modify the code.
• Many people in current world , they are not mainitaining readable code.
• We have three building blocks in writing code.
  • Readability
  • Scalable
    • Time Complexity
    • Space Complexity
• Time Complexity is like execute the program quickly meaning write less code and create less number of variables so it will take less time.
• Space Complexity is like taking more space meaning creating more variables and more methods.

Naming Conventions with examples

• Always give currect name to variable and that will be meaning full.

Recommanded and Good

const users=[];
const _users=[];
const defaultUsers=[];
const initalUsers=[];
const inActiveUsers = [];

Good only but not meaningful name

const u = []; 
const abcd = []; 
const Users = [];

For Plural give plural words only eg.users

const user = [];

Don't give your own names

const usersuers = []; 

bad if functionlity is related to users but u declared variable name as customers.

const customers = []; 

Constant Variables

• Constants are mainly used for static data or fixed values.
• We can use it for port number and data base queries etc.
• If you want deal with constants please use sepate folder or module to delclare constants thats way u can use it for reusability.
• Constant variable names are always declared as capital letters

const USERS =[] 
const SELECT_USERS = 'SELECT * FROM USERS ';
const SELECT_USERS_BY_ID = 'SELECT * FROM USERS WHERE ID = ?';

Types of variables

• let (It is scope variable we can update the after initialization)
• const (It is scope variable we can't update the after initialization. It is for const values)
• var (IT is global scope variable we can update after initialization)

Tips:

• If variable declared and not using in ur project.
• Please remove those variables why because we are unnessary wasting our memory.
• In java there is garbase collection is there and it will clean those variables.
• For javascript you only clean that variable.

In JavaScript

• Varibles spaces will be allocated in heap memory.
• Methods spaces will be allocated in stack memory.