devRant - A fun community for developers to connect over code, tech & life as a programmer

2y

Interviewer: "Using this 2D array and calculate.."
Me: "This input isn't a 2D array though. Do you want me to parse or construct a 2D array then.."
"It is a 2D array."
"Uh.. ok..and if it's not what if we.."
"Look my notes say you must use this input, and treat it as a 2D Array"
"What if I wrote a function for a 2D array similar to this input, but actually a 2D array"
"You must use only the input provided"
Me: does rain dance code for 20 minutes.
Interviewer: "hmm, maybe it wasn't a 2D Array. I like your efforts but that's all the time we have today."

I promise I can code, sometimes. It does help to have correct questions to give correct answers.

rant interview code

1

rov3rand0m

1503

3y

Real life job interview…
Manager: what about this problem? Could you solve it? (Showing me a problem about scanning a 2d array to find a value written on a piece of paper)

Me: sure! Just give me a piece of paper and I will write a solution.

Manager: no need for that. I don’t have the knowledge to check that anyway… if I wanted you to solve it I would have called one of my programmers.

…
Manager: do you have any question about the company?

Me: What do you exactly do in the company? I wonder what is the purpose of a person that makes questions about things he doesn’t know.

rant interview !rant real life manager

3

tomabolt

1778

8y

I finally ended my first side project ever. I challenged myself to write a Tetris game in vanilla JS (with the less possible lines of code), some algorithm was tougher than I expected (2d array hell) but I made it ! 500 lines of JS code, I feel I could refactor some stuffs now...

undefined tetris 2d array js game

4

Tobnac

57

5y

My first project was made with scratch (Java based drag-drop language for kids to learn) when I was like 10
I wanted to make something like mine craft but in 2D.
Its a huge plane of stone and you have to break some of them to find diamonds.
I didn't know lists or array exist. I made one variable for every freakin' stone and it took me a solid day back then.
Also if you break a stone, the background changes and it might happen that a diamond appears at a while you made 10 weeks earlier.
https://scratch.mit.edu/projects/... (it's German, don't be scared)

rant scratch minecraft wk159

6

Bubbles

6830

3y

I can’t say it’s the most painful but it’s one of my recent painful lessons.

So I’m learning C and in my project I was trying to make a copy of a 2D array and I kept getting seg faults up the ass every time I tried to allocate one of the inner arrays and after a long day of debugging I realized that I was trying to allocate memory within an array that doesn’t exist so I had to create the first array then allocate memory for each inner array after.

rant segfault c wk263 segmentation fault 2d array

4

xociety

668

8y

Failed another programming intervie. Didn't expect the 2D array question. Feel so bad. Just wanna cry and give up. I need to get better..fast.

undefined interview process believe

5

saxman343

507

5y

Fuck this algorithms course. How the fuck do you expect me to populate a 2d array of N^2 elements with data in linear time if you won't fucking let me write to more than one element at a time???

Dear CS department,
Make sure your homework makes fucking sense before shipping it off to students.
Regards,
A pissed off student

And before anyone comes at me with this "But you can technically do that if there's k*N elements and it would still be linear time" shit, fuck off; there's a worst case of needing to write to half the elements in the 2d array so it's still N^2 no matter how you try to "but technically" your way though it.

rant algorithms school fuck off

3

MrHope

117

2y

Code for Matrix Rain Using HTML

<!DOCTYPE html>
<html>
<head>
<title>Matrix Rain</title>
<style>
* {margin: 0; padding: 0;}
body {background: black;}
canvas {display: block;}
</style>
</head>
<body>
<canvas id="c"></canvas>
</body>
<script>

var c = document.getElementById("c");
var ctx = c.getContext("2d");

//making the canvas full screen
c.height = window.innerHeight;
c.width = window.innerWidth;

//english characters
var english = "1001010101110101010101010010101000101011101111010101010110101010101010101110000101";
//converting the string into an array of single characters
english = english.split("");

var font_size = 15;
var columns = c.width/font_size; //number of columns for the rain
//an array of drops - one per column
var drops = [];
//x below is the x coordinate
//1 = y co-ordinate of the drop(same for every drop initially)
for(var x = 0; x < columns; x++)
drops[x] = 1;

//drawing the characters
function draw()
{
//Black BG for the canvas
//translucent BG to show trail
ctx.fillStyle = "rgba(0, 0, 0, 0.05)";
ctx.fillRect(0, 0, c.width, c.height);

ctx.fillStyle = "#0F0"; //green text
ctx.font = font_size + "px arial";
//looping over drops
for(var i = 0; i < drops.length; i++)
{
//a random chinese character to print
var text = english[Math.floor(Math.random()*english.length)];
//x = i*font_size, y = value of drops[i]*font_size
ctx.fillText(text, i*font_size, drops[i]*font_size);

//sending the drop back to the top randomly after it has crossed the screen
//adding a randomness to the reset to make the drops scattered on the Y axis
if(drops[i]*font_size > c.height && Math.random() > 0.975)
drops[i] = 0;

//incrementing Y coordinate
drops[i]++;
}
}

setInterval(draw, 33);
</script>
<body>
</html>

devrant

1

HelmetBro

459

8y

Made a simulation/game in java using swing that runs on this algorithm:

-2D array was made (kinda like a chessboard).
-Random living cell was placed on the board.
Repeat:
-If a cell has X or less cells around it (living) it duplicates.
-If a cell has Y or more cells around it, it dies.

I was amazed at the types of shapes this created. There were so many variables I could play with, and probably spent hours just experiementing. I was really satisfied in the end. 😄

undefined wk3

4

sagiroth

415

8y

So i'm working on this course assignment program and i'm trying to remove object from a 2d array and I couldn't figure it out how to do it without messing the array indexes. Wen I was using aarrayList I could just do arrayName.remove(number), but not with the regular array. Than I had an enlightment moment.
Why not just move the object off the screen?

undefined java student

1

DubbaThony

1580

5y

Hey!

I am trying to learn creating games for android (+- 0 android expirience).

I figured I could use GoDot for it's awesome pricing (free, no strings attached).

I've done few minor things, but, to be perfectly honest, I'm fed up of GDscript. I just internally hate it more every single time I touch it, so recently I stopped attempts to learn doing games for droid/iOS.

I'm looking for free alternative to godot, preferably no strings attached, but wahtever... Here is what I need:
- I prefer code, but doing stuff in GUI is fine, but stuff like making level etc, preferably in UI
- C++ derrived syntax (ex. c# etc. c++ is fine too), no BS like some wacky workaround to do basic shit like 2d array....
- easy android/iOS export (like in godot, one day I was attempting to hello world in android and compiling for first time... was quite an advanture)
- objects
- some easy way for restfull apis
Good to have:
- ability to test project without android VM
- observer pattern (signals/slots)

I don't care what structure it's made, for me milion of scenes on one screen was extremly coutner-intuitive but meh, whatever. As long as it's possible to learn, it is fine.

Can devranters help, please?

Thanks,
peace.

question android game engine

16

demiDev

665

7y

Guys, is any one worked with d3.js ?
I need a graph and my data source is a 2d array, A Boolean array I mean.
bool[,] matrix;

question

3