What is the difference between VM based languages and those without VM? Ask Programming

So i am an aprentice as a Software developper and recently we got a presentation about PL/I .
we were told that it is used at the place i work at but only in specific areas and we can decide to learn it or not to learn it. should i Learn PL/I? and why?

submitted by /u/cyberfunk2000
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Are there websites that people share notes on programming and concepts?

Posted: 08 Apr 2021 02:44 PM PDT

As titled. I would love to learn from others in more organized ways and also share mine, but forum, websites, stackoverflow, github are just way too scattered and unorganized.

submitted by /u/obQQoV
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How to know what parts of a project to put in an API?

Posted: 08 Apr 2021 08:35 PM PDT

I am building an AR project that will be released to multiple different devices. My goal is to have it help people learn piano. I want to reuse as much code as possible when developing for new AR devices as well.

I think that the piano recognition code could go in an API. However, each AR headset has its own library of functions that would make recognition so would I have to write my API from scratch? What other functionalities would belong in the API?

submitted by /u/EdgedSurf
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how do I replace one specific segment of a URL?

Posted: 08 Apr 2021 07:55 PM PDT

Hey everyone. I have a bit of a complicated question and I'll try to explain it as best as I can. I have a program thats running CSV excel data with variables assigned. I am able to spit out the item ID correctly onto the program. I also created a variable called PartNumberOutput2 which grabs PartNumberOutput1 value and stores it in a "watched" variable. I am looking to replace this segmented URL with the text of PartNumberOutput2.

http://bricker.info/images/parts/3001.png

This link leads to an image.

I am hoping that the code can process that four digit value at the end and replace it with the value that PartNumberOutput2 is holding. So lets say PartNumberOutput1 is holding a value of 4072. I want it tell the program to switch the image to http://bricker.info/images/parts/4072.png. The website has each image listed with the appropriate label, I just don't know how to tell the program to replace this partial segment of the URL.

var partNumber = getColumn("Inventory Parts", "part_num"); var colorID = getColumn("Inventory Parts", "color_id"); var isSpare = getColumn("Inventory Parts", "is_spare"); var partNumberOutput2; var partNumberOutput3; // Section 1 var AFTERpartNumber =[]; var AFTERcolorID =[]; var AFTERisSpare =[]; //Section 2 for (var i = 0; i < partNumber.length; i++) { if (partNumber[i] == 1) { appendItem(AFTERpartNumber, partNumber[i]); appendItem(AFTERcolorID, colorID [i]); appendItem(AFTERisSpare, isSpare[i]); } } //Section 3 function updateScreen() { var index = randomNumber(0, partNumber.length - 1); setText("partNumberOutput", partNumber[index]); setText("colorIDOutput", colorID[index]); setText("isSpareOutput", isSpare[index]); //setProperty("iconOutput", "image", tomorrowIcons[index]); } //Section 4 onEvent("forecastButton", "click", function( ) { updateScreen(); partNumberOutput2 = getText("partNumberOutput"); setProperty("FigurePreviewImg", "image", "http://bricker.info/images/parts/3001.png"); }); //http://bricker.info/images/parts/3001.png

submitted by /u/ShadowWolf2020
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Create a web-scrapper to notify me when there's an available appointment

Posted: 08 Apr 2021 01:49 AM PDT

Hello everyone.

I just failed my driving test. I live in an European country and unfortunately there are absolutely ZERO appointments for another test for the next 6 or 7 months. When you call the Traffic Administration in my country they tell you to just sit by the computer and update the fucking page until something comes up like I have all the fucking time in the world

My question is: I want to make a program/web-scrapper/script that can run on my PC endlessly and update the page and then notify me whenever there's a new appointment so that I could study/work without sitting all day refresing the page by myself. I want them program to be able to navigate and filter the appointments by the city and notify me with a sound and a visual cue whenever a new appointment comes up. Can I do this in python or JS or something? I know how to code but have no idea where to begin. I wish to be able to share this program with other people who are just as frustrated as I am so I would even appreciate an advice on how to make this easily deployable to other users.

submitted by /u/Fit-Special8445
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What to focus on for job search...

Posted: 08 Apr 2021 07:38 PM PDT

I graduated about five years ago with a computer science degree. I applied for jobs freshly out of school but didn't find anything. I also didn't do any internships while in school, so that didn't help. Life got in the way, so I stopped applying for a few years and now I'm trying to get back to it so that I can use my degree.

I know it's been a while since I graduated, and I feel like a complete failure for still not having found a job in the field. I am afraid no one will hire me since it's been so long since I graduated. I am 30 years old.

I've been working on learning new things such as web and mobile app development throughout the years. The last few years I've been focusing on learning iOS development. When it comes to programming interviews, I know it's all about data structures and algorithms.

My question is, should I focus on only mastering Swift or should I also go back and revisit some programming languages I've previously used such as Java, JavaScript, and Python. Or should I just focus on Swift? I really want to get a job as an iOS app developer, but at this point, I will really take any job offering. Should I focus on my goal to get an iOS developer job or should I just go for any job and see what I get? I feel like if I go for any job and not something specific, I will have to work harder to get better at multiple programming languages as I won't really have one main target. Please, give me some advice! Focus on iOS or go after any programming job?

I also have no previous work experience as a programmer. Will I still be able to find a job even after almost six years of having graduated? How can I better prepare myself for interviews in my situation?

submitted by /u/es-code
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I couldn't take programming as my career it has devastated my life

Posted: 08 Apr 2021 09:31 PM PDT

I had pcm but computer was actually not allowed in my house during my times due to conservative parents. I never knew what programming would be like so i took mech instead fast forward to today i earn significantly less than programming colleagues. The time at which computers became accessories like smartphones I had already years ahead in my career. and obviously it's not mine a promotive job. I had only developed half taste of computers because I knew it's no use now that companies won't hire me, professional coders with a bachelors only. New peers who had more availability of comps are way ahead of me in terms of salary and everything.

I wish I had known it earlier. Is it my fault for not having an interest in computer or programming when I didn't have one!?

submitted by /u/iota7atg
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Question about Knight's Dialer algorithm with a conditional

Posted: 08 Apr 2021 03:22 PM PDT

So here's the vanilla problem: https://alexgolec.dev/google-interview-questions-deconstructed-the-knights-dialer/amp/

Level 4 makes sense and performs nicely. I'm thinking how could I solve this using level 4 solution but with an additional condition of, say, digits 8 and 3 cannot be repeated more than twice in a given sequence. In other words, same solution in level 4 but exclude from the count all sequences that have 8 appearing more than twice or 3 appearing more than twice.

Thanks!

submitted by /u/SanJuniperoan
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Why is LinkedList not used as often as List or ArrayList and are considered "not very useful" by some developers?

Posted: 08 Apr 2021 09:09 AM PDT

Why LinkedList data structure is so underused compared to other data structures or collections?

submitted by /u/jiayounokim
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c# coding challenge (real world problem solving challenge)

Posted: 08 Apr 2021 10:56 AM PDT

I'm looking for some advanced c# coding challenges. (real world problem solving challenges) I'm getting ready for a c# developer interview. any ideas?

submitted by /u/behnoodii
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Making my Bot Effective

Posted: 08 Apr 2021 02:22 PM PDT

Hi guys so I've been doing some work with puppeteer creating a bot that monitors a few sights etc but I was wondering what were the best practices to make a really effective bot. I know proxies, latency and all these things are important but I'm not sure how best to implement everything. Thanks!

submitted by /u/haekeo17
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Scraping URL from a Javascript loaded webpage

Posted: 08 Apr 2021 09:37 AM PDT

I am trying to scrape all the hrefs of the ads posted on IMMOWEB under this link. The URLs are loaded by Javascript. I am using HTMLSession but couldn't obtain my results. Here is my code:

url = 'https://www.immoweb.be/en/search/apartment/for-sale?countries=BE&isNewlyBuilt=false&maxBedroomCount=3&maxPrice=200000&maxSurface=130&minBedroomCount=1&minPrice=100000&minSurface=65&postalCodes=2000,2018,2060,2140,2170,2600,2610,2627,2640,2650,2660,2845,2850,2900,2980&page=1&orderBy=newest&card=9267356' sessions = HTMLSession() r = sessions.get(url) r.html.render() soup = BeautifulSoup(r.content, "html.parser") print (soup)

Outputs required:

https://www.immoweb.be/en/classified/apartment/for-sale/antwerpen- merksem/2170/9268787?searchId=606f2c6d4c669 https://www.immoweb.be/en/classified/apartment/for-sale/merksem/2170/9268390?searchId=606f2c6d4c669 'And other hrefs'

submitted by /u/bilalkhan19
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What IDE has a sidebar with function list?

Posted: 08 Apr 2021 09:24 AM PDT

I'm using Notepad++ for the sole reason that I can have a sidebar with all functions. I cannot live without this, but also feel a bit limited by the lack of real IDE features.

Is there any IDE with a function list displayed in sidebar ? (not a dropdown/search textarea where you type function names).

Sidebar with function list : https://i.imgur.com/dVjnbpE.png

submitted by /u/ozh
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How to find if a box of coordinates is within a line on an angle?

Posted: 08 Apr 2021 12:51 PM PDT

Thinking I need to use slope formula y=mx+b, but can't quite visualize it.

I have the starting and end X,Y coordinates.

I am trying to find out if the line goes through the box. I have the 4 corners of the box.

I have vertical and horizontal solved, but need to come up with a way to find out if this exists on an angle. I'm sure this is a solved problem and just requires implementation. Any suggestions/links/words to google?

submitted by /u/programmerProbs
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basic python digital clock using tkinter

Posted: 08 Apr 2021 11:53 AM PDT

i made python digital clock using tkinter whose code is below but when i replace

line 13, 14 with

clock=Label(root,font=("helvetica",50,"bold"),bg="YELLOW"). place(x=210,y=70)

line 17, 18 with

digi=Label(root,text="Digital clock",font="times 24 bold"). place(x=210,y=70)

line 20, 21 with

nota=Label(root,text="hours minutes seconds ",font="times 15 bold"). place(x=210,y=70)

it shows error that

Traceback (most recent call last):

File "c:\Users\91844\Desktop\study\python-projects\clock.py", line 15, in <module>

times()

File "c:\Users\91844\Desktop\study\python-projects\clock.py", line 7, in times

clock.config(text=current_time)

AttributeError: 'NoneType' object has no attribute 'config'

import sys
from tkinter import *
import time
def times():
current_time=time.strftime("%H:%M:%S")
clock.config(text=current_time)
clock.after(200,times) #Means it will wait 200 milliseconds and then call times function

root=Tk()
root.geometry("500x250")
root.title("ALARM CLOCK (Amaan)")
clock=Label(root,font=("helvetica",50,"bold"),bg="YELLOW") #line13
clock.grid(row=2,column=2,pady=25,padx=100) #line14
times()
digi=Label(root,text="Digital clock",font="times 24 bold") #line17
digi.grid(row=0,column=2) #line18
nota=Label(root,text="hours minutes seconds ",font="times 15 bold") #line 20
nota.grid(row=5,column=2) #line 21
root.mainloop()

submitted by /u/Amaanullah1102
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Is it proper to post external links (e.g., blog post) as an answer to Stackoverflow questions?

Posted: 08 Apr 2021 11:25 AM PDT

I'm fairly new to coding and just discovered the site a few weeks back. I have some good answers to some questions which I would answer in length in my blog post.

Is the Stackoverflow community encouraging this behavior?

submitted by /u/marksteve4
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Is software regarded as technology?

Posted: 08 Apr 2021 07:27 AM PDT

Me and my father are arguing over this.

submitted by /u/greywolf_18
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[Question] Compiler Under the Hood

Posted: 08 Apr 2021 05:13 AM PDT

Hi,

I'm reading:

https://www.learncpp.com/cpp-tutorial/introduction-to-variables/comment-page-1/#comments

https://www.lurklurk.org/linkers/linkers.html

From the first link, it says " When an object is defined, the compiler automatically determines where the object will be placed in memory. "

The second link says "A definition of a variable induces the compiler to reserve some space for that variable, and possibly fill that space with a particular value."

I don't understand what these mean? How can the compiler determine where an object will be placed in memory if I presume the loader would do this. Especially if you give your program to someone else on a different computer!

As for the second statement, I presume it's reserving memory in the object file for it?

submitted by /u/Robanix
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Looking for input on a website workflow using Node and React

Posted: 08 Apr 2021 11:05 AM PDT

Hi,

I'd like to create a web application and have a basic idea of what I want to accomplish, but I'm not exactly sure the best workflow for this.

The app will be simple - like a To Do list connected to a db (AWS, Firestore, other? idk, whatever has a simple setup). I'd like the front end to be React and I want a Node-based backend that'll act as a REST API gateway for the database.

To me, at the root of the project, it sounds like it makes sense to have a client (React) and server (Node) directory.

I think I'd initialize the client with create-react-app or maybe with NextJS. And then the back end with Node/Express, I guess. Does it make sense to start with express-generator? Is it overkill for something so simple? I see it creates /public/images/ and /public/stylesheets/ etc. I don't think I'll need this.

It's a bit unclear to me how Node/Express routes will work. I guess I'll only need routes set up for the API calls (db updates), right? And I'd use React-Router or NextJS's pages for front end routing.

I'd like to use GraphQL (if it's helpful/needed), but it's a bit unclear to me how & where it fits into the workflow. The database part isn't as important right now as the Node API structure. But I'll take any tips regarding easiest db to get up and running.

Any insight to this structure and workflow would be great. Are there better ways to start a project like this? Any tips, frameworks, etc that'll help will be greatly appreciated.

Thank you!

submitted by /u/SoBoredAtWork
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How can I save dynamically created JavaScript elements?

Posted: 08 Apr 2021 11:02 AM PDT

I've created a website where you can draw graph theory and run an algorithm on it. The nodes are in the form of circular buttons and the edges are SVG lines. How could I save the current stage of the graph to a file and load it at any time and retrieve the graph with the correct positions for each of the nodes and edges? The nodes and edges are dynamically created elements using JavaScript.

submitted by /u/Kaidusz1
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[C#] Need help implementing GetKeyboardState() from Win32 API

Posted: 08 Apr 2021 10:23 AM PDT

Hi,

It has been long time since I last did something useful, so I thought I'd learn something new. Trying my hand with stuff in user32.dll at the moment.

https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getkeyboardstate

The keyboard state I have at the start will never change. If I have a different state (holding shift for example) when I click "start" in IDE, I will see the difference. However, nothing changes past that point.

Every iteration I have a new array of bytes, all 0. Fetching the state fills it and doesn't return any errors. If I understood right, there are more than 1 keyboard states, depending on the thread. So I would guess I would need to fetch my data differently somehow.

using System; using System.Diagnostics; using System.Runtime.InteropServices; namespace WindowsFormsApp1 { static class Program { [DllImport("user32.dll")] public static extern bool GetKeyboardState(byte[] lpKeyState); public static void Main(string[] args) { while (true) { byte[] keyboardState = new byte[256]; bool keyboardStateStatus = GetKeyboardState(keyboardState); Debug.WriteLine(GetString(keyboardState)+"\n"); } } static string GetString(byte[] bArray) { string s = ""; foreach (byte b in bArray) { s += b.ToString(); } return s; } } }

I found this page online: https://gist.github.com/akimsko/2011327 But doing it that way doesn't seem to make any difference for me either.

// Attach to active thread so we can get that keyboard state if (AttachThreadInput(thisProgramThreadId, currentProcessID, true)) { keyboardStateStatus = GetKeyboardState(keyboardState); // Detach AttachThreadInput(thisProgramThreadId, currentWindowThreadID, false); } else { // Could not attach, perhaps it is this process? keyboardStateStatus = GetKeyboardState(keyboardState); }

I'd like the state to be up to date and correct, no matter which process/thread is currently handling my input. Any tips please?

submitted by /u/Karutapja
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What is the difference between VM based languages and those without VM? Ask Programming

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