unshift(object, path, value) ⇒ Object | Array.<any>

one of additional functions to work with array items

Returns: Object | Array.<any> - updated object Params

• object Object | Array.<any> - object to update
• path string | Array.<string> - path to be updated
• value * - value to be added

Description

import { unshift } from 'immutable-object-update';

const state = {
    a: {
        b: [ 1 ]
    }
};

const updated = unshift(state, [ 'a', 'b' ], 0);

// or

const updated = unshift(state, 'a.b', 0);

As a result we will receive new object with structure below:

{
    a: {
        b: [ 0, 1 ]
    }
}