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Mastering Development

How to store file date into multiple objects?

class.txt Reena Sam, 100, 90, 80, 100, Donna D. Bartolome, 90, 90, 100, 100, Chris Tui, 100, 90, 100, 70, How to store file data lines into multiple objects to calculate into letters and print letter grades in another file? like this: Reena Sam: A Donna D. Bartolome: B Chris Tui: C Below is my […]

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Mastering Development

Marshaling a return array from C++ to C#

I have a array in my C++ app and I want to use it’s pointer to create a C# array delegate from it without copying. So I could make it work from C# to C++ , C++ access the same array defined in C# but cannot make it work in reverse. C# Code : [DllImport(“CppDll.dll”,CallingConvention=CallingConvention.Cdecl)] […]

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Mastering Development

Encrypt with CryptoJS in JavaScript gives me different results from Java encryption

I am trying to replicate with CryptoJS an encryption done in Java using another library. The encryption’s result in Java is [111,60,-98,107,-60,5,-17,91,-52,60,-105,64,-88,31,97,-102,118,-39,-28,3,70,-12,21,-69,70,-22,-12,-91,102,-21,-88,5,82,-66,-122,34,14,-115,7,82,-55,38,-90,74,-4,62,104,104,61,-78,57,59,-51,31,84,-115,-45,-98,-87,-11,53,98,45,2,-52] and I know that this is the correct payload. So, I am replicating the same encryption with the same values but I don’t get the same array of bytes. The steps are: I […]

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Ask Mathematics

What weights should I buy for my gym? (a case of integer partitioning)

I am trying to solve for possible combinations of weights that would be appropriate for use in my home gym. I have been told that this is a case of integer partitioning, but I am not sure how to solve it and would appreciate some guidance (or even better a solution!). Given that I am […]

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Mastering Development

How to get a variable?

I want to insert a variable ttl into this conclusion: ‘rotate (‘”.c1″, 150, 100, “blue”, 60, “30 628″, -90);” instead of the number 628 after I insert the variable into the generation, the code stops working I inserted it that way. 1) rotate(“.c1”, 150, 150, 100, “blue”, 60, “30 ttl”, -90); 2) rotate(“.c1”, 150, 150, […]

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Mastering Development

Matplotlib | Change in plot representation when applying logarithmic scale

Given a set of points to be represented on a 3D plot (as scatter plot) I thought it would be interesting to plot the same data in 2D instead of 3D thanks to hist2d and using weights. This data has low and high values (some orders of magnitud apart) so when represented as a hist2d […]

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Mastering Development

Yield all full root-leaf paths through tree structure in Python

I’m trying to adapt this answer in two ways: I want to make the traverse function a class method, and I want a call to traverse to yield the list of all root-to-leaf paths (list of lists) in the tree First change was trivial, second one I’m struggling with. Here’s my class definition: class createnode: […]

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Mastering Development

How foreach works for List of Lists in JSP

[“A”,”B”,”C”,”D”,”E”,”F”] – ArrayList 01 [1,2,3,4,5,6] – ArrayList 02 [10,20,30,40,50,60] – ArrayList 03 [100,200,300,400,500,600] – ArrayList 04 Main_List – [[“A”,”B”,”C”,”D”,”E”,”F”],[1,2,3,4,5,6],[10,20,30,40,50,60],[100,200,300,400,500,600]]; Main_List is combination of four Array-lists How can I retreive Main_List in to a table which has four columns? <c:forEach items=”${List_parameter}” var=”post” varStatus=”theCount”> <tbody> <c:forEach items=”${post}” var=”value” varStatus=”cell”> <tr> <td scope=”row”>${theCount.count}</td> <td>${value.get(0)}</td> <td>${value.get(1)}</td> <td>${value.get(2)}</td> <td>${value.get(3)}</td> <td>-</td> […]

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Mastering Development

Can someone help me to find a way to calculate changing ship x, y position? And ufos’ positions at y and x? I want to start deploying AI

”’ Thanks for help ”’ import pygame import random import os import sys pygame.init() screen = pygame.display.set_mode((700, 600)) done = False clock = pygame.time.Clock() # Spaceship and Enemy UFO ship = pygame.image.load(“d:/CrashCourse/dodger/ship.png”).convert_alpha() ship = pygame.transform.scale(ship, (40, 40)) ”’ Here’s the ship initial location ”’ ship_location = [500, 500] size_ufo = [20, 30, 40, 50, 60, […]

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Linux Mastering Development Ubuntu

rtorrent on Raspberry Pi 4 and Ubuntu 19.10 – very slow download speed

I was running Deluge torrent on Raspberry 4 and then decided to migrate to rtorrent. Both torrent clients was running on Ubuntu 19.10 and on router the port is open. The networking setup was the same, with Ethernet cable on router. With Deluge I got about 2-3 MB/sec download speed and now with rtorrent it’s […]