list.set(index, value)

Sets the item at index. Typically, splice should be used instead.

import {DefineList} from "can";

const list = new DefineList(["A","B"]);
list.set(2,"C");

console.log(list[2]); //-> "C"

Splice should be used because it will trigger a length event. If you are using .set(index, value), you should make sure to use .get(index) when reading values from the array. If you use .splice(), you can use list[index] to read values from the array.

list.set(prop, value)

Sets the property at prop. This should be used when the property isn't already defined.

import {DefineList} from "can";

const list = new DefineList(["A","B"]);
list.set("count",1000);

console.log(list.get("count")); //-> 1000

list.set(newProps)

Deprecated 3.10.1

Passing an {Object} to .set has been deprecated in favor of assign or update. list.set(index, value) is not deprecated.

Updates the properties on the list with newProps.

import {DefineList} from "can";

const list = new DefineList(["A","B"]);
list.set({count: 1000, skip: 2});

console.log(list.get("count")); //-> 1000