memento | Fairly basic redis-like hashmap implementation | Key Value Database library

In order for autocomplete to work , you also need to pass on the InputProps down to custom textfield. So I would change your renderInput function like this:

There isn't a real generic answer to this question. It all depends on the structure of your database, span of the transactions across entities, distributed transactions, how much time/transactions are allowed to pass before your can revert the change, etc.

Memento Pattern is one of the possible approaches, however it needs to be modified due to the nature of the relational databases as follows:

1. You need to have transaction log table/list that will hold the information of the entities and attributes (tables and columns) that ware affected by the transaction with their primary key, the old and new values (values before the transaction had occurred, and values after the transaction) as well as datetimestamp. This is same with the command (memento) pattern.
2. Next you need a mechanism to identify the non-explicit updates that ware triggered by the stored procedures in the database as a consequence of the transaction. This is important, since a change in a table can trigger changes in other tables which ware not explicitly captured by the command.
3. Mechanism for rollback will need to determine if the transaction is eligible for roll-back by building a list of subsequent transactions on the same entities and determine if this transaction is eligible for roll-back, or some subsequent transaction would need to be rolled-back as well before this transaction can be rolled-back.
4. In case of a roll-back is allowed after longer period of time, or a near-realtime consumption of the data, there should also be a list of transaction observers, processes that need to be informed that the transaction is no longer valid since they already read the new data and took a decision based on it. Example would be a process generating a cumulative report. When transaction is rolled-back, the rollback will invalidate the report, so the report needs to be generated again.

For a short term roll-back, mainly used for distributed transactions, you can check the Microservices Saga Pattern, and use it as a starting point to build your solution.

Another approach is to keep incremental updates or also known as history tables. Where each update of the row will be an insert in the history table with new version. Similar to previous case, you need to decide how far back you can go in the history when you try to rollback the committed transaction.

Finally, when you work with business data such as invoice, inventory, etc. you also need to check what are the regulations related with the cancelation of committed transactions. As example, in the accounting systems, it's not allowed to delete data, rather a new row with the compensation is added (ex. removing product from shipment list will not delete the product, but add a row with -quantity to cancel the effect of the original row and keep audit track of the change at the same time.

Since you haven't given any code on what you have tried, I will give a way to get you started with solving this problem: Remove spaces from the actual title and use that to find the title in the dataframe you want to fix (use a df.merge to join between two dfs and merge on the title without the space)

Use flexbox:

feed is of type Feed (var feed Feed). type Feed is defined as:

You can use a controlled approach for the input value using the inputValue and onInputChange props. This allows you to control the input value at all times. Material-UI will call onInputChange when it thinks the value should change, and Material-UI passes a reason of "input", "reset", or "clear" (see onInputChange in the props documentation). You want to ignore the "reset" changes.

Here's a modified version of your sandbox:

It's scoped to your extension, so you can keep them simple:

However, when an extension uses storage, it will always get it's data stored under 1 key (the extension name + extension ID). We never allow to write directly into storage under a key that could conflict with other keys.

(source)

Calculating delay with n * 60 gives you exact number but if simulate the same delay with n setTimeout()s it won't match because setTimeout() doesn't guarantee exact timeout.

So instead you can remove the nested Observable and make one chain that using concatMap will first take each memento and then each character.

You cannot use withId when selecting menu items because the menu is inflated with their own views and ids, and so your id action_logout will never exist in the view hierarchy (NoMatchingViewException):

Try a different view matcher instead, use withText for example: