lively | source software that allows users | Dektop Application library

The question may sound pretty primitive, but it has spawned as the result of a (lively) discussion about the (best case) complexity of removing an element from a List (at the end).

Here are some points I have considered before posting this question:

• Complexity of removing an element at the end of a List<> is O(1)
• Complexity of removing any element (be it even the last one) from a static array is O(n), as it requires a new array.

Now keeping in view the above two arguments and the fact that we have an array in the background of List<> implementation as well.

So why does the List<> operation lead to O(1) and the same for the array into O(n) when both are involving the recreation of an array? Or am I missing something here? Thanks!

UPDATE: Just to clarify, this question's major focus is not on why the last element removal's complexity is O(1), but rather on why it's O(n) for array vs. O(1) for List<>. The title has been updated to reflect the changes. Thanks to the answer (which addresses it) and other comments..`

I have an application where I have a form. In this form, I need to wait for the user to not have inputted anything for 200ms before validating. I am doing that with a promise, but now there are other ways for the "wait 200ms and then validate" promise to be triggered (for example, setting your focus on the field also triggers validation after 200ms - the idea is that if you don't start typing in the first 200ms, the field will show you the errors for the empty input).

The problem with that is that, when React batches requests, useEffect is called only on the last value and I use useEffect to cleanup the promises (which are wrapped timeouts with cancellation provided by Bluebird).

Here is example code which shows my problem, but instead does it with buttons: https://codesandbox.io/s/lively-flower-3w3lc?file=/src/App.js.

Here, if I have one button, it works as expected - it only logs "Hey" once I've stopped clicking. However, it doesn't work with two buttons. How can I make it work? Is there a way to stop just these requests from batching, if that's needed?

After compiling I receive this error message:

Failed to compile src\App.js Line 4:1: 'state' is not defined no-undef

Code App.js:

The task is to implement a recorder based on the standard web audio api. Having carefully studied both ways ScriptProcessorNode.onaudioprocess & AudioWorkletProcessor.process did not come to a final decision. It is officially said that onaudioprocess has been deprecated since 2014 and a full replacement is audio workers. I'm new to javascript and maybe the question sounds stupid, but why is there an active use of onaudioprocess to this day?

Let's dive into the details. AudioWorkletProcessor api is available for 73% of users, while onaudioprocess api for 93%. In the next 2 years, we can hope for a 10 percent increase. (safari users). There are many projects, articles, solutions using onaudioprocess. Even specific tasks can be solved simply by using onaudioprocess. Such solutions are not possible for AudioWorklet. AudioWorklet documentation is poor and few mentions on the internet. For example, I still don't understand why a WebWorker knows what a blob is, but AudioWorklet doesn't (devTools exception: Uncaught ReferenceError: Blob is not defined). In the typescript, there are long-open cases for declaration types of basic functionality. All this creates the impression that onaudioprocess is more lively than AudioWorklet. Perhaps the AudioWorklet is more productive but difficult to implement, or is the web audio api not needed by the javascript community? Explain why I should choose AudioWorklet according to the official recommendation?

I'm new to React. I'm attempting to add an onClick event to a div element that will remove a className from another element. These elements are part of a loop in a map. I am attempting to use the useRef hook for this. I specifically don't want to toggle classNames, I want to remove it, and that's it. Then add it back with another onclick event from another element. This requirement is specific to my application. My current code removes the className from the last element, not the one I am targeting. Thanks in advance for any help!

Disclaimer, I'm rather new to WPF.

Currently, whenever I place another control onto the Designer, all other controls are completely erased from the XAML code. Consequently, I'm completely unable to do anything.

Should I be making a separate XAML file for each control? Or is there something weird going on otherwise?

For reference, here is my current XAML code:

Here is my problem. I developed a tkinter GUI for my project. However I am stuck with tkinter limitations. I developed python gui to create a virtual view for a red table as below. The window does not have any border or title. It is just put on the a picture background which is outside of the code.

However as you can see it is not lively enough for me. I want it to look like this:

Is there a way to do this in tkinter? I tried transparent backgrounds, however in Ubuntu transparent background with visible object is not possible. Also You cannot make different window shapes other than rectangle. What is your suggestions? Should I use another library. I really need an expert opinion about this.

Transparent background reference

Different window shape other than rectangle

My environment : Ubuntu 16.04 Python 3.5.2

I imported useState from react but Its giving me the following error: "React Hook "useState" is called in function "navbar" that is neither a React function component nor a custom React Hook function." Does anyone see something wrong with my use?