Code Quality

Code Quality Guide

클린 코드 원칙

1. 의미 있는 이름

# Bad
d = get_current_date()
arr = filter(u -> u.a > 18, users)

# Good
currentDate = get_current_date()
adultUsers = filter(user -> user.age > 18, users)

2. 함수는 작게, 한 가지 일만

# Bad: function doing multiple things
function processUser(user):
    # validation
    if not user.email:
        throw Error("Email required")
    # data transformation
    user.email = lowercase(user.email)
    # DB save
    db.users.insert(user)
    # send email
    sendWelcomeEmail(user)

# Good: single responsibility
function createUser(userData):
    validatedData = validateUserData(userData)
    normalizedData = normalizeUserData(validatedData)
    user = saveUser(normalizedData)
    sendWelcomeEmail(user)
    return user