TSON Patch

> Statically typed JSON Patch operations

Usage

You have some kind of nested data that you want to work with. It could look something like this:

``typescript
export type User = {
id: string;
name: {
first: string;
last?: string;
}
friends: {
[from: string]: Array<{ name: string }>
}
};
`

A mess to work with, right? Not anymore:

$3

All operations are pure and return shallow copies

#### Get

`typescript
import * as tp from 'tson-patch'
tp.get(user, ['friends', 'college', 0, 'name']) // Compiles just fine
tp.get(user, ['friends', 'college', 0, 'age']) // COMPILE ERROR: 'age' doesn't exist in 'name'
`

#### Set

`typescript
tp.set(user, ['friends', 'college', 0, 'name'], 'John') // Now user.friends.chess[0].name === 'John'
tp.set(user, ['friends', 'college', 0], {name: 'John'}) // Exactly the same
tp.set(user, ['friends', 'college', 0, 'name'], {name: 'Oops'}) // COMPILE ERROR (types don't match)
`

#### Remove

`typescript
tp.remove(user, ['id']) // COMPILE ERROR ('id' is not nullable)
tp.remove(user, ['name', 'last']) // ''
`

#### Move

`typescript
tp.move(user, ['id'], ['friends', 'college']) // COMPILE ERROR (Types don't match)
tp.move(user, ['id'], ['friends', 'college', 0, 'name']) // OK
`

#### Swap

`typescript
tp.swap(user, ['id'], ['friends', 'chess']) // COMPILE ERROR (Types don't match)
tp.swap(user, ['id'], ['friends', 'chess', 0, 'name']) // OK
``