list.updateDeep(newItems)

Similar to .update(), .updateDeep() will overwrite values within list with values from newItems. Where update() will replace values or properties one level deep, .updateDeep() will overwrite values or properties on objects and lists recursively.

The following will:

• remove payal from people,
• set justin's name to "JUSTIN", and
• remove justin's age property:

import {DefineMap, DefineList} from "can";

const justin = new DefineMap({name: "Justin", age: 35}),
      payal = new DefineMap({name: "Payal", age: 35});

const people = new DefineList([justin, payal]);

people.updateDeep([
  {name: "JUSTIN"}
]);

console.log( justin.serialize(), payal.serialize() );
//-> {name: "JUSTIN"}, {age: 35, name: "Payal"}
console.log( people.serialize() ) //-> [
//   {name: "JUSTIN"}
// ]

Use .assignDeep() if you want recursive updating that doesn't remove properties. Use can-diff/merge-deep/merge-deep if you want recursive updating that is identity aware.