Caterpillar | Caterpillar : Type-safe date formats | Date Time Utils library

I am currently attempting to programm a small game. An enemy is supposed to chase the player, the actual chasing is not implemented yet. I still need to figure out how to do that, but that's not the question. I have made it so that the player returns to the start point once they collide with the enemy. In addition to that, a text 'Game over' is supposed to appear. The function for that is called at the end of the game loop and while the text appeared briefly(it actually only appeared once, I have tried it multiple times), it does not stay. I was planing on making it appear and then disappear after a few seconds so that the player can play again, but I'm not sure why it disappears instantly. If this is the wrong place to post this, please tell me, I will delete this post. This is my code, would be amazing if somebody could help me out:

I am reading from a book, and then I was following the instructions but this error occurred

I have a huge data-frame (>20m rows) with each row containing a timestamp and a numeric variable X. I want to assign a new column where for each row the value in this new column is the average of X in the previous rows within a specified time window e.g the average of all rows with time stamps no more than 5 min ago. Since the time stamps aren’t at regular intervals I can’t just take fixed slices

Currently the best approach I’ve found is a “caterpillar” algorithm which loops through the data frame once and moves the start/end index depending on whether the timeframe window has been breached. However this is proving infeasibly slow, and I was wondering if there was a clever vectorised way to do this? Perhaps involving np arrays instead?

Thanks

First time encountering this so please bear with me.

I'm writing a React web app that pulls in data from a local db.json file and stores it in global state using the Context API. I have the data displayed on the page and I have a dropdown that pulls in the category names of this data as well.

When I select a dropdown item from the list, I'd like it to filter the list of data to that selected category.

Currently when you select a dropdown item, I get the following error:

"TypeError: Cannot read property 'toLowerCase' of undefined".

This tells me that I'm probably not accessing the 'category' data properly.

Here's an example of the JSON, I want to access the 'category':

I'm trying to find a computationally friendly way for doing the following:

given list_of_strings = ['many', 'man', 'cat', 'caterpillar', 'pillow', 'pi', 'pill']

return sublist = ['many', 'caterpillar', 'pillow'], i.e. the list of strings not contained in any other string.

The simplest solution would be to iterate over the elements and check whether each element is contained in the other, with O(n^2) complexity (even if there are some little optimizations I thought about, like sorting the strings by length, but this adds the sorting complexity), but I think it's too expensive.

I thought also about implementing a trie and then use each element of the list as an haystack, then keeping just the strings contained in one haystack (that of the string itself).

I think I'm missing more than I know, so I'm looking for suggestions

I ran a bayesian linear mixed model with brms and can plot the estimates nicely but I can't figure out how to order the single-subject estimates based on the mean of the posterior samples (so as to get a caterpillar plot). This is what I've done.

Toy data:

What the class describes is about "reversing a string", which is correct and usable from the Leetcode website. Today, I want to present "reversing a string" by inputting a value by myself (such as the int main() part below), but I still can't execute it after thinking for a long time. Beginners sincerely ask for advice, maybe you can also attach your writing so that I can learn, thank you.

I've been doing an exercise and we need to create a caterpillar with the size attribute from the other function. In this code below I've added a size attribute between 0 and 3.

I have run into a problem in my project and could use some help figuring out what I am doing wrong.