113 replies

Implementing Immutable Classes in TypeScript

How do you guys implement immutable classes? In Scala (sorry I'm primarily a Scala dev), we have a

.copy

.copy

.copy

.copy method in each

case class

case class

case class

case class (a "record"), which allows us to make a copy of an instance and modify a field

Example:

case class Person(name: String, age: Int)
val jules = Person(name = "Jules", age = 34)
val olderJules = jules.copy(age = 35)

// result in memory:
// jules = Person("Jules", 34)
// olderJules = Person("Jules", 35)

case class Person(name: String, age: Int)
val jules = Person(name = "Jules", age = 34)
val olderJules = jules.copy(age = 35)

// result in memory:
// jules = Person("Jules", 34)
// olderJules = Person("Jules", 35)

case class Person(name: String, age: Int)
val jules = Person(name = "Jules", age = 34)
val olderJules = jules.copy(age = 35)

// result in memory:
// jules = Person("Jules", 34)
// olderJules = Person("Jules", 35)

case class Person(name: String, age: Int)
val jules = Person(name = "Jules", age = 34)
val olderJules = jules.copy(age = 35)

// result in memory:
// jules = Person("Jules", 34)
// olderJules = Person("Jules", 35)

How to achieve this

.copy

.copy

.copy

.copy thing in TS?

Implementing Immutable Classes in TypeScript

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