thirsty | Reminds you to drink water - on your terminal | Command Line Interface library

I have a React component that displays a grid of tiles. Some of those tiles might throw an error when they try to render. Using an error boundary I could simply capture the error and return a different component (e.g., one showing an error message).

But, what I would really like is to make the tiles that throw an error disappear and not to take space in the grid (that is, no empty space should exist between tiles because of a tile that threw an error).

I thought I had a solution, but it turns out it is not working. The idea was to store the tiles in state, and then make the error boundary execute a callback function that would remove the problematic tiles from the state. But, it seems the method that captures the error in the error boundary does not have access to React state.

Following you can see the code for this idea:

I'd like to know how to do 2 execution plans: "traditional" execution plan joins (A with B) and then C. The "new" plan joins (A with B) then (A with C) and then joins the result of those joins so there would be 3 joins. How would I code the traditional and new plan in Oracle SQLPlus given the code below? I also need to measure the time complexity of both methods to show that the new plan takes less time, which I believe I just do with set timer on; The joins can be on whatever attributes work. Same with select statements. I made a artist, b album, c track, and d played.

Here's the database:

I'm trying to render Material UI TreeView dynamically, so I want to add new nodes on the node expanding event. I tried to do that, but stuck with some strange behavior. I have a json data variable with some nodes, on the node expanding I'm adding some new child nodes to that variable and pass it to my render function, but unfortunately my tree doesn't change. If I add that extra nodes in another variable in advance and render that variable on node expand, the tree does change, I can't understand why, because at the time of passing that variables to the render function, the variables have the same data. Here is my example: https://codesandbox.io/s/thirsty-swanson-ld8nt?file=/src/index.js

I have a form inside a route, that if there are any validation errors, it should not allow the user to navigate to another route. If there are no validation errors, then allow navigation to another route.

Below is my current code, which the onBlock function does not work does to its async nature as the functions to submit and then validate the form are asynchronous.

I have a layout with 3 columns when large then for mobile i resize it to each row the full width of the grid on mobile. When large I need column 1 and 3 to be sticky to the top when column 2 is scrolling. I made an example here on codesandbox.

Here is also the css from the sandbox:

I have a component like this:

I am trying to render a component if (age<18) in the next block of code

I am trying to access a value within an object I'm getting from my Redux store.

Here's my Redux state:

I'm setting this on app load like this:

I have an input field (type file) that for some reason validates even though is not required. With serial number i have a validation and it is not required and seems to work fine, no errors when submitting the empty field.. For the file input field I want only the input field to validate when a file is being uploaded. What am i doing wrong?, i get this(see image below) when i click submit to test the validation.

here's my code: