Clean Code Ethics
Install library
% npm i @raccoons-co/ethicsStrict
Strict.notNull(...)
public static notNull<T>(reference: T, message?: string): NonNullable<T>
Ensures that an object reference is not null.
Returns the non-null reference that was validated.
Throws NullPointerException if reference is null.
Strict.checkArgument(...)
public static checkArgument(expression: boolean, message?: string): void
Ensures the truth of an expression.
Throws IllegalArgumentException if expression is false.
Optional
Optional.empty()
public static empty<T>(): Optional<Exclude<T, undefined>>
Returns an empty optional with no present value to get.
Optional.of(...)
public static of<T>(value: T): Optional<NonNullable<T>>
Returns an optional of given non-null value.
Optional.ofNullable(...)
public static ofNullable<T>(value: T): Optional<NonNullable<T>>
Returns an optional of given non-null value, otherwise an empty optional.
Optional isEmpty()
public isEmpty(): boolean
Returns status of value absence.
Optional isPresent()
public isPresent(): boolean
Returns status of value presence.
Optional get()
public get(): T
Returns the value if present or empty optional throws NoSuchElementException.
Optional orElseThrow()
public orElseThrow(): T
Returns the value if present or empty optional throws NoSuchElementException.
Optional orElse(...)
public orElse(otherValue: T): T
Returns the value if present or else returns other value.
Optional ifPresent(...)
public ifPresent(performAction: (value: T) => void): void
Performs the given action with the value, otherwise does nothing.
Optional ifPresentOrElse(...)
public ifPresentOrElse(action: (value: T) => void, emptyAction: () => void): void
Performs the given action with the value, otherwise performs the given empty-based action.
Immutable
Class Annotation @Immutable
Encapsulates instance of annotated class into ImmutableObject instance which prevents mutation
of the original class instance.