Hammerheart

I'm going through the Programming With a Purpose course on Coursera, and trying to come up with my own implementation of some of the example programs before looking at the example. I just finished the example of a gambling situation. I was hoping to get some more eyes on my code and be told whether my version is going to behave differently from the example. Due to the nature of simulations, I can't just compare the output of the two, since it will vary.

This is the explanation of what the code is meant to represent:

Gambler (PROGRAM 1.3.8) is a simulation that can help answer these ques tions. It does a sequence of trials, using Math.random() to simulate the sequence of bets, continuing until the gambler is broke or the goal is reached, and keeping track of the number of wins and the number of bets.

Mine:

public class Gambler
{
    public static void main(String[] args)
    {
        int stake = Integer.parseInt(args[0]);
        int initialStake = stake;
        int goal = Integer.parseInt(args[1]);
        int desiredGain = goal - stake;
        int trials = Integer.parseInt(args[2]);
        int games = 0;
        int wins = 0;
        int bets = 0;

        while (games < trials)
        {
            bets++;
            if (Math.random() >= 0.5)
            {
                stake++;
                desiredGain = goal - stake;
                if (desiredGain <= 0)
                {
                    wins++;
                    games++;
                    stake = initialStake;
                }
            }
            else
            {
                stake--;
                if (stake < 1)
                {
                    games++;
                    stake = initialStake;
                }
            }
        }
        int averageBets = bets / trials;
        int percentWins = (100*wins / trials);
        System.out.println("Theoretical chance of winning: " + 100*initialStake/goal);
        System.out.println("Expected Bets: " + initialStake*(goal - initialStake));
        System.out.println(percentWins + "% wins");
        System.out.println("Average # bets: " + averageBets);
    }
}

Example:

public class Gambler2
{
    public static void main(String[] args)
    {
        int stake = Integer.parseInt(args[0]);
        int goal = Integer.parseInt(args[1]);
        int T = Integer.parseInt(args[2]);
        int bets = 0;
        int wins = 0;

        for (int t=0; t<T; t++)
        {
            int cash = stake;
            while (cash > 0 && cash < goal)
            {
                bets++;
                if (Math.random() < 0.5) cash++;
                else                     cash--;
            }
            if (cash == goal) wins++;
        }
    int averageBets = bets / T;
    int percentWins = (100*wins / T);
    System.out.println("Theoretical chance of winning: " + 100*stake/goal);
    System.out.println("Expected Bets: " + stake*(goal - stake));
    System.out.println(percentWins + "% wins");
    System.out.println("Average # bets: " + averageBets);
    }
}

The example is obviously much cleaner, but here is why I think mine should work the same:

1. Each time the player's current stake exceeds the goal or reaches 0, the number of games played is incremented. When games == trials, the loop ends.
2. When a game ends, stake is reset to its initial value for the next trial
3. Bets is incremented each time the loop runs
4. If the current stake meets or exceeds the goal, wins is incremented

I set up my conditions for interpreting the output of Math.random() opposite of the example. If that even makes a difference at all, it seems like it would take a lot more than 1000 trials before it became apparent.

I just want to make sure I'm not missing something.

I've been struggling with getting a wezterm window running cmus on a specific workspace upon start up for a while now. I can't use assign because the only eligible criteria differentiating it from a generic wezterm window is the pid, and my attempts to get the pid from get_tree and use that have been unsuccessful. I thought I had figured it out, when I put these lines in a another file:

#! /bin/bash
sway workspace 10 && sway 'exec wezterm -e cmus'

then in my config file I have this: exec ./start_cmus.sh

But it doesn't work. If I run start_cmus from the shell, the expected behavior ensues (a wezterm window running cmus is opened on workspace 10).

Any tips?

I have to read more Zelazny after this. I was struck by two things in particular: The surprising playful quality of the prose. He has little vignettes dispersed among the main narrative, and it gave me the sense that Zelazny was having a lot of fun while writing this book. It was kind of refreshing after reading so many other self-seriously, rigidly constructed novels. It gave me a feeling similar to the ones I experience when I listen to some experimental music, where the process is not treated as a mere necessary evil on the way to the finish product.

The second thing was struck a chord was the ending. I liked how it was all show and no tell, which I wasn't expecting. It was kind of creepy, and very intense. I wasn't expecting such a visceral end to a book which, until then, had been rather laid back.

Now that I've finished it, I feel like it was very dense, thematically. I suspect I will revisit it and gleam many meanings which I missed this time.

I would like to open the thread to recommendations. I've heard he wrote a fantasy series that is pretty good, and I think I would like to check that out.

So this is really kind of tangential, I am just messing around with the data and trying to at least nail down some basics so I can do sanity checks in my actual code. I am running into an odd discrepancy when trying to determine the number of times "XMAS" occurs in the input. I am only concerned with the straight forward matches, the instances of the substring "XMAS" appearing in the raw data.

When i do "grep -c XMAS input" or "rg -c XMAS input" they both show 107. But when I use regex101.com and search for the pattern XMAS, it shows 191 matches. Please help, I am truly at a loss here. While writing this, it occurred to me to just try using string.count("XMAS") in python on the data as a raw string, and it also returns 191. So really this question is more about grep and rp than anything. why are they only returning 107?

I am working on a rudimentary Breakout clone, and I was doing the wall collision. I have a function that I initially treated as a Boolean, but I changed it to return a different value depending on which wall the ball hit. I used the walrus operator to capture this value while still treating the function like a bool. I probably could have just defined a variable as the function's return value, then used it in an if statement. But it felt good to use this new thing I'd only heard about, and didn't really understand what it did. I was honestly kind of surprised when it actually worked like I was expecting it to! Pretty cool.

cross-posted from: https://programming.dev/post/14680192

I have a VPS, but no root access so I can't use apt, or even read a lot of the system files. I would like to get jellyfin (or any media server, really) running on it. Jellyfin has a portable installation option, so I followed the instructions in the docs to install it from the .tar.gz.

But it says I have to install ffmpeg-jellyfin, and I can't find a portable installation of that. My VPS already has ffmpeg installed on it. Will jellyfin work if I just point it to that instead? Or, how can I go about installing ffmpeg-jellyfin without root access?

I'm working on a little gui app that will eventually (hopefully) add a watermark to a photo. But right now I'm focused on just messing around with tkinter and trying to get some basic functionality down.

I've managed to display an image. Now I want to change the image to whatever is in the Entry widget (ideally, the user would put an absolute path to an image and nothing else). When I click the button, it makes the image disappear. I made it also create a plain text label to see if that would show up. It did.

Okay, time to break out the big guns. Add a breakpoint. py -m pdb main.py. it works. wtf?

def change_image():
    new_image = Image.open(image_path.get()).resize((480, 270))
    new_tk_image = ImageTk.PhotoImage(new_image)
    test_image_label.configure(image=new_tk_image)
    breakpoint()

with the breakpoint, the button that calls change_image works as expected. But without the breakpoint, it just makes the original image disappear. Please help me understand what is happening!

edit: all the code

import io
import tkinter as tk
from pathlib import Path
from tkinter import ttk

from PIL import ImageTk
from PIL import Image

from LocalImage import Localimage
from Layout import Layout

class State:
    def __init__(self) -> None:
        self.chosen_image_path = ""

    def update_image_path(self):
        self.chosen_image_path = image_path.get()



def change_image():
    new_image = Image.open(image_path.get()).resize((480, 270))
    new_tk_image = ImageTk.PhotoImage(new_image)
    test_image_label.configure(image=new_tk_image)
    breakpoint()

TEST_PHOTO_PATH = "/home/me/bg/space.png"
PIL_TEST_PHOTO_PATH = "/home/me/bg/cyberpunkcity.jpg"
pil_test_img = Image.open(PIL_TEST_PHOTO_PATH).resize((480,270))
# why does the resize method call behave differently when i inline it
# instead of doing pil_test_img.resize() on a separate line?


root = tk.Tk()

root.title("Watermark Me")
mainframe = ttk.Frame(root, padding="3 3 12 12")
mainframe.grid(column=0, row=0, sticky="NWES")

layout = Layout(mainframe)

image_path = tk.StringVar()
tk_image = ImageTk.PhotoImage(pil_test_img)
test_image_label = ttk.Label(image=tk_image)

entry_label = ttk.Label(mainframe, text="Choose an image to watermark:")
image_path_entry = ttk.Entry(mainframe, textvariable=image_path)
select_button = ttk.Button(mainframe, text="Select",
                           command=change_image)
hide_button = ttk.Button(mainframe, text="Hide", command= lambda x=test_image_label:
                  layout.hide_image(x))
test_text_label = ttk.Label(mainframe, text="here i am")
empty_label = ttk.Label(mainframe, text="")

for child in mainframe.winfo_children():
    child.grid_configure(padx=5, pady=5)

entry_label.grid(column=0, row=0)
image_path_entry.grid(column=1, row=0)
hide_button.grid(column=0, row=3)
select_button.grid(column=0, row=4)
test_image_label.grid(column=0, row=5)
empty_label.grid(column=0, row=6)


image_path_entry.insert(0,TEST_PHOTO_PATH)
image_path_entry.focus()
breakpoint()



root.mainloop()

So I just had an issue where my shebang lines weren't parsing properly for a python script I was attempting to execute. A quick google revealed that it was probably because I wrote the scripts on windows and now I was trying to run them on Linux (so happy i finally made the switch btw. using the computer is fun again!). So i took the advice I found and tried to run :%s/^M/ (using C-v, C-m to insert the escape character), and it failed to find any matches. I tried the same command in vanilla vi and it worked.

Is there some setting I don't have configured properly? I would prefer to be able to do this sort of thing within neovim.

I'm new to vim and getting the hang of the configuration. I've gone through a couple of youtube videos giving a tutorial of setting it up with lazy.nvim. Now I am following ThePrimeagen's config, and UndoTree doesn't work.

The plugin is loaded and my config is properly sourced, but when I run run :UndoTreeToggle, I get this lovely error:

(E5108: Error executing lua: function undotree#UndotreeToggle[11]..<SNR>37_new[2]..41, line 6: Vim(echoerr):"diff" is not executable. stack traceback: [C]: at 0x7ff77ae89570)

I am running windows (currenty in the process of backing up my personal data so I can try out Linux without feeling too disconnected from my daily computer user). I did a little bit of google searching and checked the issues on github, unfortunately I couldn't find anything related to my problem. Any help would be much appreciated.