how to update whole object in array using lodash
var arr = [{id: 1, name: "Person 1"}, {id:2, name:"Person 2"}];
// Find item index using _.findIndex (thanks @AJ Richardson for comment)
var index = _.findIndex(arr, {id: 1});
// Replace item at index using native splice
arr.splice(index, 1, {id: 100, name: 'New object.'});
// "console.log" result
document.write(JSON.stringify( arr ));
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