The Big Programming Thread - Page 684

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Thread Rules
1. This is not a "do my homework for me" thread. If you have specific questions, ask, but don't post an assignment or homework problem and expect an exact solution.
2. No recruiting for your cockamamie projects (you won't replace facebook with 3 dudes you found on the internet and $20)
3. If you can't articulate why a language is bad, don't start slinging shit about it. Just remember that nothing is worse than making CSS IE6 compatible.
4. Use [code] tags to format code blocks.

Manit0u

Poland17852 Posts

November 28 2015 14:23 GMT

#13661

I support Acrofales here. I did setup a free EC2 instance for a simple website I did. At least this way you can test your think in an actual production environment. Just remember to select options that are noted as 'eligible for free instance' or something like that. I was running the website for 10 months (tournament registration, news, driving instructions etc.) and in total I had to pay for it $2.30 since the traffic was higher than I expected and I've made a mistake of uploading one really large image by mistake (this one image was like 5MB+ which increases your transfer a lot). I've corrected the mistake as soon as I noticed but still I had to pay up.

Well worth it in my opinion.

If you're working with PHP I really suggest you learn at least the basics of Linux. Stuff like git and composer can make deploying your websites a breeze.

tofucake

Hyrule19264 Posts

November 28 2015 14:34 GMT

#13662

git and composer both work on Windows too though

If your computer is powerful enough, you can also setup a VM for development and use vagrant. That's super handy.

Manit0u

Poland17852 Posts

November 28 2015 15:50 GMT

#13663

Thinking some more about it. Why use gpg when it's so troublesome on Windows?

I guess you could simply roll with this one, which is part of PHP core package:
http://php.net/manual/en/function.openssl-public-encrypt.php

phantomfive

Korea (South)404 Posts

November 28 2015 18:42 GMT

#13664

The biggest problem I have making a website is the artwork :/

Manit0u

Poland17852 Posts

November 28 2015 19:31 GMT

#13665

On November 29 2015 03:42 phantomfive wrote:
The biggest problem I have making a website is the artwork :/

That's why you hire an artist to make all the logos, favicons and other important pictures for you. You also tell them to design proper font, link and button colors for you. All is left for you is simply overriding several variables in Twitter's bootstrap and your page looks amazing.

Also, let me share with you this awesome resource that helped me a lot when I was doing some front-end work:

https://www.google.com/design/spec/material-design/introduction.html#

Really good for anyone interested in UI design. Also helps you realize what stuff you need to think about before designing how the user-facing part of your application is going to look like.

Soap

Brazil1546 Posts

November 28 2015 21:20 GMT

#13666

I've been setting up a spare machine as a server. Most recently I couldn't get wake-on-lan to work while connected directly to the router, then I gave up and moved it to a wireless router I'm improvising as a switch, and there it worked. Go figure...

WarSame

Canada1950 Posts

November 28 2015 22:24 GMT

#13667

You could use a Raspberry Pi for a very cheap/weak server nowadays. Or an AWS instance.

Acrofales

Spain18473 Posts

November 29 2015 01:11 GMT

#13668

On November 29 2015 07:24 WarSame wrote:
You could use a Raspberry Pi for a very cheap/weak server nowadays. Or an AWS instance.

Pi is 100% fine for what most people want to host.you can install raspian and lamp and you're set. Or what we have running: mysql and node. We had couchdb at one point too. Runs like a charm and we do more intensive stuff than most people who aren't already looking at cloud solutions.

Draconicfire

Canada2562 Posts

November 29 2015 12:44 GMT

#13669

Hey guys, so I'm trying to write an algorithm to search an image for a specific colour. I have a colour in RGB values that I'm looking for and I can extract pixel values from the image in RGB as well. Initially I just used these and calculated the Euclidean distance but the results weren't too accurate. So I read online that converting RGB into Lab colour space is more accurate as it accounts for human perception a bit better, so I did the conversion but it still doesn't really seem that accurate.

Does anyone have any ideas on how to improve this? I'm not too familiar with colour spaces so I'm at a bit of a loss here.

Acrofales

Spain18473 Posts

November 29 2015 13:30 GMT

#13670

On November 29 2015 21:44 Draconicfire wrote:
Hey guys, so I'm trying to write an algorithm to search an image for a specific colour. I have a colour in RGB values that I'm looking for and I can extract pixel values from the image in RGB as well. Initially I just used these and calculated the Euclidean distance but the results weren't too accurate. So I read online that converting RGB into Lab colour space is more accurate as it accounts for human perception a bit better, so I did the conversion but it still doesn't really seem that accurate.

Does anyone have any ideas on how to improve this? I'm not too familiar with colour spaces so I'm at a bit of a loss here.

Try the last response to this thread: http://stackoverflow.com/questions/6242114/how-much-worse-is-srgb-than-lab-when-computing-the-eucleidan-distance-between

WarSame

Canada1950 Posts

November 29 2015 19:19 GMT

#13671

Where do all of you go for code review? I'm writing a lot of code in my free time right now, but there's definitely improvements to be made, even if just stylistically. Are there any communities with good, clear feedback on code?

EDIT: Also, about AWS, we got so lucky with it this year. My group for a project was trying to make a video of a Mandelbox which is very intense. We tried to do it on our computers but they couldn't handle it, so we though to try a free AWS instance. At 7 or 8 in the morning after an all nighter. Turns out that we selected the wrong instance and ran up $200 in usage. We explained it in an email about the bill and they let us off free.

Thank god, because we had no money to pay that...

Acrofales

Spain18473 Posts

November 29 2015 20:47 GMT

#13672

On November 30 2015 04:19 WarSame wrote:
Where do all of you go for code review? I'm writing a lot of code in my free time right now, but there's definitely improvements to be made, even if just stylistically. Are there any communities with good, clear feedback on code?

EDIT: Also, about AWS, we got so lucky with it this year. My group for a project was trying to make a video of a Mandelbox which is very intense. We tried to do it on our computers but they couldn't handle it, so we though to try a free AWS instance. At 7 or 8 in the morning after an all nighter. Turns out that we selected the wrong instance and ran up $200 in usage. We explained it in an email about the bill and they let us off free.

Thank god, because we had no money to pay that...

For anything coding related, your first goto option should almost always be stackexchange...

http://codereview.stackexchange.com/

That reminds me a bit of that guy who was here a few months back with his (somewhat disastrous) university homework project. I wonder if he got let off the hook too. We never heard the end of that story...

WarSame

Canada1950 Posts

November 29 2015 21:41 GMT

#13673

That was probably me. We were getting destroyed on that project. It was heading into exam time, so two of the four of us had to split to study for exams. The other 2 of us stayed up until 8 or 9 in the morning one night trying to finish it. We had it working but not generating properly for higher resolutions because it took so long. That's when we thought of using AWS which took forever, especially with us sleep deprived. Eventually I figured it out and felt great about overcoming the struggle until I got hit by the $200 bill.

Soap

Brazil1546 Posts

November 29 2015 22:49 GMT

#13674

I think it was this guy:

On July 14 2015 18:48 FFGenerations wrote:
so like 2 months after i tried to host my project on amazon for like 2 hours just trying to see if it would work

they bill me $76 with an additional $10 usage last month and $40 forecast usage for this month

i have no fucking clue what is going on

WarSame

Canada1950 Posts

November 30 2015 22:38 GMT

#13675

Just got that job offer from the interview I was talking about earlier. $60k and benefits. It starts in a month and a bit(they hire in waves). Boy, am I excited!

Birdie

New Zealand4438 Posts

November 30 2015 23:29 GMT

#13676

On December 01 2015 07:38 WarSame wrote:
Just got that job offer from the interview I was talking about earlier. $60k and benefits. It starts in a month and a bit(they hire in waves). Boy, am I excited!

Nice job fam! Out of interest, is this a graduate position?

WarSame

Canada1950 Posts

November 30 2015 23:32 GMT

#13677

Depends what you mean by a graduate position. It's a career job, and offers 6 weeks of training before getting placed. Is that what a graduate position is?

Birdie

New Zealand4438 Posts

November 30 2015 23:33 GMT

#13678

On December 01 2015 08:32 WarSame wrote:
Depends what you mean by a graduate position. It's a career job, and offers 6 weeks of training before getting placed. Is that what a graduate position is?

I mean, did you just graduate from university/is it your first programming job.

WarSame

Canada1950 Posts

November 30 2015 23:53 GMT

#13679

Yes! I'm actually 6 months out from graduation now, but it is my first programming job. In the intermission I've been coding for myself and working on a startup with my friend.

WarSame

Canada1950 Posts

December 02 2015 20:16 GMT

#13680

So I've been at the library 9-6 for today and yesterday preparing for my job. I've run into a snag with Java, and I can't understand the answers I've googled.

I'm creating a generic stack Stack<T extends StackNode<E>, E>, with StackNode<E>. However, I can't declare a new StackNode in my Stack properly. Using

T node = new T(data);

throws an error on the T, saying it can't be instantiated. Google results say this is due to erasure, but not really how to get around it. This seems to be the best answer, but I can't figure out how to apply it to my specific case. Where do I place the function mentioned? Where do I call it from? How do you call it? The comments tried to clear it up but I can't understand those well enough, either.

My current attempt in Stack looks like:


public class Stack<T extends StackNode<E>, E> {
	private T top;
	private int size;
	public Stack(E data){
		T node = createContents(T.class, data);
		this.top = node;
	}
}

and in StackNode:


public class StackNode<E> {
	private E data;
	private StackNode<E> next;
	public E createContents(Class<E> clazz, E data) throws InstantiationException, IllegalAccessException{
		return clazz.newInstance();
	}
	public StackNode(E data){
		this.data = data;
		this.next = null;
	}
}

However, Stack has 2 errors - it can't find CreateContents and it says that T.class is an illegal literal. Further, the "constructor" is only able to call the empty constructor. I think that can be handled by calling another function that sets the value of data, although I'm not sure how to get the value where it needs to be. If anyone can give me advice on how to do this or tell me a better way to do this I'm all ears. Thanks!

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