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[Shades]

I use Eclipse for most stuff. It's terrible and slow but it's better than most of the other IDE's I've used. For Java or C++ at least, although it's syntax parsing of C++ is appalling. I use Netbeans for PHP which also has Java support, but I don't know how good it is for that.

I also spend a lot of time in Vim, with it's vast collection of plugins you can pretty much customise it how you like. Although it's autocomplete functions for programming suffers somewhat imo. However it is installed everywhere so always to hand, very fast and easy to use.

[Silfurdreki]

I'm back with more noob problems!

I've gotten far enough that I now have a single line file consisting of roughly 8 million hexadecimal numbers, separated by spaces, stored as text in a temporary file. Something like this, only longer:

Code: [Select]

ffff 5a7 53ef 816 54 e7f
I want to read these and convert them to decimal numbers. I've tested the function fscanf, but I'm not quite sure it does what I want it to do (my own testing has yielded strange results). What I want is simple, read 1 to 4 characters, treat them as a hexadecimal number and then write them to another file. Any advice?

I appreciate any and all advice!

[The Watcher]

Assume each number is four hex characters.
Us whatever i/o library to read them into a [4] sized array, then convert all letters to number values and number characters to values. Then, do 16^3*[0] + 16^2*[1] + 16^1*[2] + [3].
[n] is the nth position in that array.

The result of the above should be assigned to a variable, then converted to a string and output.


Note that the above may be far from optimal.

[RulerOfNothing]

So fscanf(file,"%s ",&str) doesn't load characters up to the next space? What "strange results" have you been getting? If it doesn't do what I think it does I might be able to give you some better advice after a bit of thought.

[Silfurdreki]

Now that I see your post there, I might have made the mistake of supplying fscanf with a variable rather than the pointer to said variable. I'll check it out once I get back to uni tomorrow.

For the record, I get a very large number as output (something like ffaa5000, I can't quite remember), the first input is supposed to be ffff.

Assume each number is four hex characters.
Us whatever i/o library to read them into a [4] sized array, then convert all letters to number values and number characters to values. Then, do 16^3*[0] + 16^2*[1] + 16^1*[2] + [3].
[n] is the nth position in that array.

The result of the above should be assigned to a variable, then converted to a string and output.


Note that the above may be far from optimal.

I might be able to work with something like this if fscanf turns out to be too much trouble, thanks for the suggestion.

[DeadlyLintRoller]

I'm back with more noob problems!

I've gotten far enough that I now have a single line file consisting of roughly 8 million hexadecimal numbers, separated by spaces, stored as text in a temporary file. Something like this, only longer:

Code: [Select]

ffff 5a7 53ef 816 54 e7f
I want to read these and convert them to decimal numbers. I've tested the function fscanf, but I'm not quite sure it does what I want it to do (my own testing has yielded strange results). What I want is simple, read 1 to 4 characters, treat them as a hexadecimal number and then write them to another file. Any advice?

I appreciate any and all advice!

Even though folk don't seem to take kindly to java around here. here is how to do it in that.

Code: [Select]

import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.io.File;
import java.util.Scanner;
public class ReadHex {

public static void main(String[] args) throws FileNotFoundException {

Scanner input = new Scanner(new File(args[0]));

String output = "";
PrintWriter out = new PrintWriter(args[1]);

while(input.hasNext()){
String hex = input.next();
out.print(Integer.parseInt(hex,16)+" ");
}

out.close();

}
}

It takes arguments in through the command line, but you could modify for a prompt.

[Thendash]

Why don't people like java around here? I like it... That being said, c# is my go to language right now.

[MorleyDev]

Why don't people like java around here? I like it... That being said, c# is my go to language right now.

It's pretty common for programmers who don't exclusively code in Java to have lots of complaints with Java that seem small by themselves but when combined together form a wall of pain.

If I'll be permitted, I present a rant I did elsewhere about some of my issues: I don't like the way it's built up as a language.

Spoiler (click to show/hide)

I don't like how they removed useful language features like operating overloading simply because they had the potential to be abused. It's programming, everything has the potential to be abused. Don't handicap the programmer as a result of this.

I don't think the standard libraries are well-designed or well-implemented on a fundamental level (favouring inheritance in situations where composition makes much more sense, for example). Swing is also a painful messes.

I don't like it's pseudo-namespace import system and think it mainly an annoyance.

I don't like how implementation details defined several syntax features (Current terrible ways around the lack of generics use type erasure? Well clearly the features of generics must be limited as a result of this -_- Yes that was sarcasm).

I don't like how they've refused to evolve the language meaningfully or add any new and major additions syntax in a long time. Recent announcements with Java 8 have started to move towards some evolution, but it's very little and very late.

I don't think it's a good language to learn how to program with, and consider it a little better than Visual Basic in terms of teaching some bad habits. Because Java has a lot of little things I haven't even listed that add up to make it a terrible language in my eyes.

I do think C# got right a lot of what Java has gotten wrong. Hence my personal recommendation of the former.
C# has disposables for when RAII is useful for clean code.
C# has delegates and lamdas, because newing up an anonymous class to define how a simple addition or comparison occurs in a flexible library is madness.
C# has optional overflow detection for when overflow really can matter.
C# has unsigned integral types, because those are also useful.
C# supports the floating point IEEE 754 standard, because, you know, standards matter.
C# has a decent generic implementation.
I have complaints with C# (as I do with every language), but not as many as I do of Java.

Now, unsigned integrals and "closures" are going into Java 8 but like I said, it's very little and very late.

Still better than PHP though. If you want a good write-up on PHP, I recommend this article: PHP - A Fractal of Bad Design http://me.veekun.com/blog/2012/04/09/php-a-fractal-of-bad-design/

[Valid_Dark]

http://me.veekun.com/blog/2012/04/09/php-a-fractal-of-bad-design/

fixed that for you

Spoiler: quote from article (click to show/hide)

I can’t even say what’s wrong with PHP, because— okay. Imagine you have uh, a toolbox. A set of tools. Looks okay, standard stuff in there.

You pull out a screwdriver, and you see it’s one of those weird tri-headed things. Okay, well, that’s not very useful to you, but you guess it comes in handy sometimes.

You pull out the hammer, but to your dismay, it has the claw part on both sides. Still serviceable though, I mean, you can hit nails with the middle of the head holding it sideways.

You pull out the pliers, but they don’t have those serrated surfaces; it’s flat and smooth. That’s less useful, but it still turns bolts well enough, so whatever.

And on you go. Everything in the box is kind of weird and quirky, but maybe not enough to make it completely worthless. And there’s no clear problem with the set as a whole; it still has all the tools.

Now imagine you meet millions of carpenters using this toolbox who tell you “well hey what’s the problem with these tools? They’re all I’ve ever used and they work fine!” And the carpenters show you the houses they’ve built, where every room is a pentagon and the roof is upside-down. And you knock on the front door and it just collapses inwards and they all yell at you for breaking their door.

That’s what’s wrong with PHP.

[DeadlyLintRoller]

I'm not out to advocate java over other languages. Learning it was a pragmatic choice. I wanted to enroll in a reputable master's program with in-state tuition, which lead me to Virginia Tech's M.I.T. which is all about the java. Same goes for php, which I use for work. php is pretty bad in a lot of ways, but given that it was conceived by some random Dutch-Canadian guy for his personal website, can you blame it?

I don't yet have the experience to articulate the shortcomings/strengths it has over other languages, but I would agree that java was tough to start off on as a complete beginner programmer. There are a lot things happening that you just need to accept as the way it's done until you have built out the context within your knowledge to understand why that's happening. But, I'd guess that is true for many languages. Like anything it just requires experience.

In the DF skill level measuring system (assuming 1 xp = 1 hour practicing a given craft), I guess I am a Competent Programmer. but that time is split between php, javascript and java, plus other mundane tasks that relate to being a developer, but not necessarily actual coding, like setting up a vhost, releases, version control etc.

[Levi]

In sheer "get stuff done fast" power, Ruby is still my favorite.  I can translate what is in my head to code so quickly with it.  Its not appropriate for everything, but man is it ever useful. 

I actually didn't mind java much until after I learned Ruby.  Now I'm spoiled and everything in java just seems like too much work.   

[Urist McScoopbeard]

My question is what IDE should I be using?

Tip #1: Don't learn Java.
But if you do, IntelliJ is quite a good IDE.

I dont have a choice, that's what taught in comp sci H/AP

... And to be honest i'm not looking to create the world's most processing intensive game.

EDIT: although to be honest i would have rather liked to take class for c/c++/c#

[MorleyDev]

I'll tell you what I tell everybody else who does Computer Science:

Don't bother with the lectures. Well, bother with them. But find the time, completely separate from course and obligation, to program and learn to program. Use a different language even! I maintain lectures and academia are as fitting a place to learn programming as they are to learn painting. You can pick up useful tid-bits, get help with technique and understanding, but ultimately, you need to do the self-study to actually develop any skill.

Working in a team is also very useful. Find someone who knows about as much as you and pair with them. Sit at one computer and take turns coding to get something working, communicate, share ideas and understanding, ask each other for help when you hit a wall.

[Urist McScoopbeard]

This is high school comp sci, there are no 'lectures' infact the teacher doesn't talk too much about coding at all, most of the learning is conceptual, then we're asked to write a program. Goes on like that, and then we have short quizzes.

However, I like your suggestion, only problem now is most of the kids in the class are either terrible or terribly unsocialable. (my only close friend in the class doesnt really get the logic)

[Valid_Dark]

I've always wanted someone to code with