https://community.appian.com/discussions/f/general/19884/find-and-update-data-from-multidimensional-array-of-objectsI have an array which contains multiple objects, for example local!cartItems: [ {id:22,name:abx,cost:10,qty:1}, {id:23,name:xyz,cost:15,qty:1}, {id:24,name:jkl,cost:18,qty:1}, {id:25,name:test ,cost:50,qty:1} ] now I want to get the object whose iden-USTelligent Community 12https://community.appian.com/thread/77695?ContentTypeID=1Mon, 09 Nov 2020 09:25:09 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:99cbe73b-06e5-4b3a-852a-725d46cd6556ranjank0001<p>Thanks Stefan!</p><div style="clear:both;"></div>https://community.appian.com/thread/77694?ContentTypeID=1Mon, 09 Nov 2020 09:16:32 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:1f9c0f0a-481c-4803-b060-74839f3379daStefan Helzle<p>Try lookup(local!cartItems.id, 24)</p><div style="clear:both;"></div>https://community.appian.com/thread/77692?ContentTypeID=1Mon, 09 Nov 2020 09:10:12 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:ba58c81a-e0ad-472b-b197-ae876dcbc061ranjank0001<p>Thanks for your response!</p> <p>But how to find any item by key-value like how can I get item or index of the item whose id is 24. lookup() and wherecontains() are for indexed arrays but I don&#39;t understand how to match the key-value and get the index of the item.</p><div style="clear:both;"></div>https://community.appian.com/thread/77688?ContentTypeID=1Mon, 09 Nov 2020 08:18:57 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:0a40a698-9417-4324-a0ff-e14bedfc3f5aStefan Helzle<p>In Appian, local variables are immutable. Taking aside that in interfaces you can modify variable in a saveInto. But in general, you can use lookup() or wherecontains() to find items in a list, index() or &quot;[]&quot; to fetch that item and updatearray() to create a new array with modified data.</p><div style="clear:both;"></div>