Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[MorleyDev]

Well for C++, the IDEs aren't that great. You can achieve most of what an IDE will give through hooking vim or emacs to clang for auto-complete. Some of the latest C++11 IDEs (VS 2013 and Jetbrains) can also provide some decent type deduction for when you use auto (i.e Hold CTRL and hover over the variable name for the full type to be presented). The refactoring support is still fairly crude, only Jetbrains really have anything decent and that's still in a very early access program. For compiling I still do all the C++ stuff by cmd/shell.

Though for C#, Java, Scala etc. Can't work without an IDE. The IDEs are much easier to use and the refactoring support is too great

[Lightningfalcon]

For my English project on Hamlet I am making a game where you are presented with some story information and then make a choice.  Instead of putting everything into the code itself I decided to have it read from a text file.  My problem is that I am currently getting a NullPointerException.  Normally I would try to fix this myself, but I'm getting it in the part of the code that my Comp Sci teacher gave us specifically to allow us to do stuff without learning IO, even thou he did encourage us to try. 

Spoiler: my code (click to show/hide)

Code: [Select]

import java.util.*;
import java.lang.*;
class reader
{
String line="";
ArrayList<String> deci= new ArrayList<String>(); //List of storys, sorted by ID
ArrayList<dec> list= new ArrayList<dec>();
String info="";  //To be passed
String temp="";
dec a; //used to add to list
int count=0;

reader()
{
Filein file= new Filein("Libraries\\Documents\\info");
temp= file.readLine();
System.out.println(temp);
while (!temp.equals("end"))
{
if (temp.equals("info"))
{
info=file.readLine();
}
if (temp.equals("dec"))
{
do
{
temp= file.readLine();
if (temp.equals("break")) break;
deci.add(temp);
} while (true);
count++;
a= new dec(info, deci, count);
list.add(a);
}
temp.equals(file.readLine());
System.out.println(temp);
}
file.close();
}

ArrayList<dec> getList()
{
return list;
}
}

Spoiler: IO stuff I was given (click to show/hide)

import java.io.*;
import java.util.*;
import java.lang.*;

//10-19-07 Began conversion from BufferedReader format to Scanner
//10-20-07 Conversion done, testing begin. Remove mark()/reset() since they're not necessary.
//10-23-07 Superseded the old version of Filein

class Filein
{
   private Scanner in;         //The inputstream
   private String name;      //The name of the file
   
   private String word;      //used in readWord()
   
   private char lastchar;      //used in read()
   private int charloc;      //used in read()
   private boolean newWord;   //used in read()
   private int wordLength;      //used in read()
   
   private boolean DelChanged;   //used in Delimiter Settings
   
   Filein(String Fname)      //Opens the file
   {
      name=Fname;
      lastchar = 0;
      charloc = 0;
      newWord = true;
      
      word="";
      DelChanged=false;
      try{in = new Scanner(new FileInputStream(name));}
      catch(java.io.FileNotFoundException e){}
   }
   
   void setDel(String del)      //Sets Delimiter in use.
   {
      try{in.useDelimiter(del);}
      catch(java.lang.IllegalStateException e){}
      DelChanged=true;
   }
   
   void setDefaultDel()      //Resets Delimiter to default.
   {
      try{in.useDelimiter("\\s*");}
      catch(java.lang.IllegalStateException e){}
      DelChanged=false;
   }
   
   String readLine()   //Reads one line at a time
   {
      try{return in.nextLine();}
      catch(java.util.NoSuchElementException e){return "";}
      catch(java.lang.IllegalStateException e){return "";}
   }
   
   char read()      //Reads one character at a time
   {
      setDel("");   //Set Delimiter to nothing to read Char by Char
      
      if(!newWord)
      {
         if(charloc <= wordLength-1)
         {
            lastchar = (char)word.charAt(charloc);
            charloc++;
            return lastchar;
            
         }
         else {newWord = true;}
      }
      
      if(newWord)
      {
         charloc=0;
         newWord = false;
         word = readWordDel();
         wordLength = word.length();
         lastchar = (char)word.charAt(charloc);
         charloc++;
         return lastchar;
      }
      
      return '\u0000';
   }
   
   String readN(int n)      //Reads n characters in file
   {
      StringBuffer temp=new StringBuffer("");
      for(int i=0;i<n;i++)temp.append(this.read());
      return temp.toString();
   }
   
   String readWordDel()   // Reads anything into a String.
   {
      try{return in.next();}
      catch(java.util.NoSuchElementException e){return readWordDel();}
      catch(java.lang.IllegalStateException e){return "";}
   }
   
   String readWord()         // Reads anything into a String.
   {
      if(DelChanged)setDefaultDel();
      
      try{return in.next();}
      catch(java.util.NoSuchElementException e){return readWord();}
      catch(java.lang.IllegalStateException e){return "";}
   }
   
   double readDouble()      //Reads a double from a file
   {
      try
      {
         while(!in.hasNextDouble())   //check if next token is a double
         {   
            in.next();             //if not skip to next token.
         }
         
         return in.nextDouble();   //return double
      }
      catch(java.util.NoSuchElementException e){return 0;}
      catch(java.lang.IllegalStateException e){return 0;}
   }

   long readLong()
   {
      try{
      while(!in.hasNextLong())      //check if next token is a long
         {   
            in.next();             //if not skip to next token.
         }
         
      return in.nextLong();
      }
      catch(java.util.NoSuchElementException e){return 0;}
      catch(java.lang.IllegalStateException e){return 0;}
   }
   
   boolean hasNextInt(){return in.hasNextInt();}
   
   int readInt()
   {
      try
      {
      while(!in.hasNextInt())      //check if next token is a Int
         {   
            in.next();             //if not skip to next token.
         }
      return in.nextInt();
      }
      catch(java.util.NoSuchElementException e){return 0;}
      catch(java.lang.IllegalStateException e){return 0;}
   }
   
   double readNumber()            //returns any of the common number types as a double!
   {
      try
      {
         while(!in.hasNextInt() & !in.hasNextLong() & !in.hasNextDouble() & !in.hasNextShort())   //scan for all common number types
         {
            in.next();
         }
      
         if(in.hasNextInt())
         {
            try{return (double)in.nextInt();}
            catch(java.util.NoSuchElementException e){return 0;}
            catch(java.lang.IllegalStateException e){return 0;}
         }
         if(in.hasNextLong())
         {
            try{return (double)in.nextLong();}
            catch(java.util.NoSuchElementException e){return 0;}
            catch(java.lang.IllegalStateException e){return 0;}
         }
         if(in.hasNextDouble())
         {
            try{return in.nextDouble();}
            catch(java.util.NoSuchElementException e){return 0;}
            catch(java.lang.IllegalStateException e){return 0;}
         }
         if(in.hasNextShort())
         {
            try{return (double)in.nextShort();}
            catch(java.util.NoSuchElementException e){return 0;}
            catch(java.lang.IllegalStateException e){return 0;}
         }
      }
      catch(java.util.NoSuchElementException e){}
      catch(java.lang.IllegalStateException e){}
         
      return 0;
   }
   
   String readFile()   //Reads entire file into a string
   {
      StringBuffer temp=new StringBuffer("");
      while(this.ready()){temp.append(this.readLine());temp.append("\n");}
      return temp.toString();
   }

   boolean ready()      //returns true if the file is not EOF
   {
      try{return in.hasNext();}
      catch(java.util.NoSuchElementException e){return false;}
      catch(java.lang.IllegalStateException e){return false;}
   }
   
   String name(){return name;}   //returns file name

   void close()    //Closes the file
   {
      try{in.close();}
      catch(java.lang.IllegalStateException e){}
   }
}

Spoiler: What it is reading from (click to show/hide)

Code: [Select]

info
This is a test
dec
Option 1
Option 2
Option 3
Option 4 Option test
Option 5
break
Option Should not appear
info
This is what should appear when Option 1 is pressed
dec
Test
break
This is what should appear when Option 2 is pressed
dec
Test
break
This is what should appear when Option 3 is pressed
dec
Test
break
This is what should appear when Option 4 is pressed
dec
Test
break
This is what should appear when Option 5 is pressed
dec
Test
break
end


The place where I am getting the error is Line 52 in the IO code, where it says "try{return in.nextLine();}"

[SolarShado]

For my English project on Hamlet I am making a game where you are presented with some story information and then make a choice.  Instead of putting everything into the code itself I decided to have it read from a text file.  My problem is that I am currently getting a NullPointerException.  Normally I would try to fix this myself, but I'm getting it in the part of the code that my Comp Sci teacher gave us specifically to allow us to do stuff without learning IO, even thou he did encourage us to try. 
--- snip ---
The place where I am getting the error is Line 52 in the IO code, where it says "try{return in.nextLine();}"

That IO code is terrible...

The problem is a cascade of your file path not being valid: "Libraries\Documents\info" is interpreted as relative path; you probably need the absolute path (which should start with "C:\").

The NPE is because of this

Code: (from the provided IO code) [Select]

  try{in = new Scanner(new FileInputStream(name));}
  catch(java.io.FileNotFoundException e){}

That silently swallows the vastly more informative FileNotFoundException and leaves in unassigned (and therefore null).

I'm guessing you haven't gotten to exception handling yet either, or that constructor should have throws FileNotFoundException on it so your code can catch the exception.

Also, style tip/nitpick: class names should start with a capital letter.

EDIT: i fail bbcode...

[Gatleos]

I am going to embark on programming a text adventure with nothing but a TI-89 Titanium calculator. I will post the results later.

Heh, I got my start in programming on a TI-86. Not fun on a tiny LED screen, but it's better than math class.

[Lightningfalcon]

That was the problem.  I know know why I didn't spot that myself sooner.  Now time to get to regular unwanted feature removal. 

[miauw62]

I am going to embark on programming a text adventure with nothing but a TI-89 Titanium calculator. I will post the results later.

Heh, I got my start in programming on a TI-86. Not fun on a tiny LED screen, but it's better than math class.

I wrote a few TI-84 programs myself :v
Not that I have the patience to write anything more complex than CALCULATOR Q on that teeny tiny screenlet.
Well, maybe it's motivation because I actually have TokensIDE on this computer so I could just use that if I wanted to.

[Telgin]

Ah, the TI-8X series was my first stab at programming too.  I remember there was a racing game of some sort on one where it simulated the road as columns of '|' characters and used 'O' as the car, and you played it by using the arrows to move left and right while the car automatically went forward.  It was amazingly simple, but still a time killer when I got done with work in my high school calculus class.  One day the teacher wiped all of the games off of the calculators, but I was bored so I started poking through the built in command list, created a new program and got to work.

Two days later, my teacher walked by and we had an exchange along these lines:

"Huh, I thought I deleted all of those."

"Yeah, I just tried creating a new one."

She gave me a surprised look.  "Oh, okay then."  She never said anything about it after that. 

One thing I do remember about the TI-86 at least is that programs that looped infinitely would continue to slow down as the program ran.  So pretty much any game would eventually fall prey to it and become unplayable.  The original game didn't have that problem though, which perplexed me for a long time.  Apparently the TI-86 and similar calculators had two ways they could be programmed: using TI BASIC or some prebuilt binary transferred from a computer, which I'm guessing was compiled from C or a similar language to its native machine code.  Those programs didn't have the problem, so it was something about the TI BASIC interpreter.  I feel like I did somehow get around the slowdown problem using the interpreter, but I have no idea how.

[miauw62]

Yeah, the TI-8X series is built on one type of CPU: the z80. A lot of games for that series are made in z80 assembly.

[dreadmullet]

So much TI-83 nostalgia. I was that kid in the corner who played with his calculator instead of doing the classwork. I made (naive) planetary gravity simulations. Random stuff that used the draw functions to make random lines or spirals all over the screen. I remember attempting to play around with cellular automation and accidentally creating a Sierpinski Triangle.

I tried making a tank artillery game where you select an angle and shot power and try to hit the other tank, but the TI BASIC programming interface was beyond abysmal. My program became like over 10 screens long, and navigating the cursor to where I wanted to go was painful. You only had 26 variables, one for each letter of the alphabet, and keeping track of which variable was which and not running out of variables was a nightmare. Maybe that's why I prefer overly long variable names today.

Coincidentally, I still keep next to me the same calculator I used back then, with all the programs I made still on it. Let me see here...

Code: [Select]

If T+Y*A-O<T+.4 and T+Y*A-O>T-.4 and S+X*A<I+.55 and S+X*A>I-.55
then
Disp "Hit"
0->Q
Stop
Else
If (T+Y*(A-1)-J)<-10.25
then
Disp "Miss"
1->Q
Stop
Else
Oh gods, it gets worse. The next if statement takes up the entire 16x7 character display. It's a programmer's worst nightmare.

[miauw62]

2nd lock + arrow keys allows you to navigate quickly.

I actually have all of my little programlets on this computer, had to evacuate them here because our calculators get wiped before exams...
(Well, it's just three of them :v, and they're pretty simple. Not larger than 450 bytes)


E: Alright, here they are. Exported to my PC via TI-Connect and then text-ified by TokensIDE.

Spoiler: ADV, not what its name suggests. (click to show/hide)

Code: [Select]

randInt(0,3)->A
randInt(0,50)->B
randInt(1,50)->C
Disp B
Disp C

If A=0
Then
Disp "/"
Prompt D
D=B/C->E
End

If A=1
Then
Disp "*"
Prompt D
B*C=D->E
End

If A=2
Then
Disp "-"
Prompt D
B-C=D->E
End

If A=3
Then
Disp "+"
Prompt D
B+C=D->E
End

If E
Then
Disp "JUIST =)"
End
If E!=1
Then
Disp "FOUT =("
End

This is the most complex one, and I'm a little bit proud of it.

Spoiler: MOVE aka Calculator Q (click to show/hide)

Code: [Select]

Lbl I
0->A
4->Y
8->X
6->Z
1->theta
0->S
ClrHome
While 1
0->A
ClrHome
Output(Y,X,"O"
Z+randInt(~1,1)->Z
theta+randInt(~1,1)->theta
If Z<1
Then
16->Z
End
If Z>16
Then
1->Z
End
If theta<1
Then
8->theta
End
If theta>8
Then
1->theta
End
Output(theta,Z,"Q"
If theta=Y and X=Z
Then
Goto M
End
S+1->S
While A=0
getKey->A
End
If A=25
Then
Y-1->Y
End
If A=34
Then
Y+1->Y
End
If A=26
Then
X+1->X
End
If A=24
Then
X-1->X
End
If X>16
Then
1->X
End
If X<1
Then
16->X
End
If Y>8
Then
1->Y
End
If Y<1
Then
8->Y
End
End
Lbl M
Output(3,4,"SCORE:"
Output(3,10,S
Output(4,4,"GAME OVER"
Output(5,4,"CONTINUE?"
0->L
While L<=20*5
getKey->H
L+1->L
Output(6,8,5-iPart(L/20
If H
Then
Goto I
End
End

Spoiler: TUOP, some generic glitched error thingie i made to show off. (click to show/hide)

Code: [Select]

0->A
ClrHome

While 1
A+1->A

If A>8
Then
1->A
Output(randInt(1,8),3,"!RORRE!RORRE"
Output(randInt(1,8),randInt(1,16),"?")
Output(randInt(1,8),randInt(1,16),"?")
Output(randInt(1,8),randInt(1,16),",")
Output(randInt(1,8),randInt(1,16),",")
Output(randInt(1,8),randInt(1,16),"ERROR!ERROR!")
End

Output(A,2," ERROR!ERROR! ")
End

[Skyrunner]

Link to web app thing I made. Javascript needed.
It's a site that visualizes how many times people replied to other people for any specified subreddit, reading the last 100 top posts. It also stores the posts for future reference.

Using it is not too difficult--input the subreddit name, set a threshold comment limit, and then submit. If the subreddit chosen has not been requested by anyone else for 24 hours, it'll take around 5 minutes to update the archive. If the number of comments shown on the [log page](http://i.imgur.com/yaO9Ua4.png) reaches 100 but nothing happens, just refresh the page and chances are the graph will appear. This is a minor bug that I haven't had time to fix. Another possible bug is the message "The subreddit X does not exist," when it does. The answer to fixing it is refreshing repeatedly until it works


Here's an example of a graph. Scrolling and panning is possible. The top row of buttons are actually menus, and clicking them will change the context bar to the right. Right clicking a circle will temporarily remove it from the graph, allowing a user to declutter. They may be restored through the ``Hidden nodes`` menu. The text may be toggled off, through the ``Controls-Hide Labels`` menu. Left-clicking on a node or name will show details, mainly consisting of the comments that person has left or have been replied on. Clicking the links will expand them into a pseudo-Reddit comment tree, allowing the user to get the gist of the conversation. Another minor bug is that comment trees consisting of A-B-A-B will appear each time, say, A replied, assuming the current clicked node is for A. Example.


So far, I've served only 435 graphs, with 29 unique views. :< I have no idea how to advertise this--I'd like more users to see if it scales well and stuff.

[miauw62]

What's that? A shitty half-completed text-adventure game that has no content yet, that's what!

Yeah, I made this.

[tahujdt]

Not necessarily programming based, but web design based: In web design class, instead of a final, we have a final project in which we build a website. Now, for context: I built my first website when I was seven. Seeing as it  took me two days of half-goofing-off to get half-way done, I need help: what are some cool CSS or Javascipt tricks I can spruce it up a bit.

[Lightningfalcon]

I hate coming again so soon after my previous problem with the same program, but I've spent almost my entire day after getting home trying to fix this with no success.  The problem is that when I'm creating a list of dec classes, the arraylist ids and deci are not being created with anything in them.  The output I get is just the very first info "You are to report to Claudius in the throne room.  What do you do?" 

Spoiler: reader (click to show/hide)

Code: [Select]

import java.util.*;
import java.lang.*;
class reader
{
String line="";
ArrayList<String> deci= new ArrayList<String>(); //List of stories, sorted by ID
ArrayList<dec> list= new ArrayList<dec>();
ArrayList<String> ids= new ArrayList<String>();
String info="";  //To be passed
String temp="";
dec a; //used to add to list
String id;

reader()
{
Filein file= new Filein("E:\\info.txt");
temp= file.readLine();
while (!temp.equals("end"))
{
if (temp.equals("info"))
{
info=file.readLine();
id= file.readLine();
}
if (temp.equals("dec"))
{
do
{
temp= file.readLine();
if (temp.equals("break")) break;
deci.add(temp);
ids.add(file.readLine());
} while (true);
a= new dec(info, deci, id, ids);
list.add(a);
deci.clear();
ids.clear();
}
temp=file.readLine();
//deci.clear();
//ids.clear();
}
file.close();
}

ArrayList<dec> getList()
{
return list;
}
}

Spoiler: dec (click to show/hide)

Code: [Select]

import java.util.*;
import java.lang.*;
class dec
{
String info;  //Presents story to reader
ArrayList<String> deci= new ArrayList<String>();  //List of possible decisions player can make
String id; //How to identify
ArrayList<String> ids= new ArrayList<String>(); //How to identify, should match deci
dec (String a, ArrayList<String> b, String c, ArrayList<String> d)
{
info=a;
deci=b;
id=c;
ids=d;
}
String getInfo()
{
return info;
}
ArrayList<String> getDeci()
{
return deci;
}
String getID()
{
return id;
}
int getDeciSize()
{
return deci.size();
}
String getDec(int num)
{
return deci.get(num);
}
String getcid(int num)
{
return ids.get(num);
}
ArrayList<String> getIDS()
{
return ids;
}
int getidSize()
{
return ids.size();
}

}

Spoiler: game (click to show/hide)

Code: [Select]

import java.util.*;
import java.lang.*;
class game
{
reader read= new reader();
ArrayList<dec> list= read.getList();
Scanner scan= new Scanner(System.in);
dec a;
int num=0;
String temp;
boolean flag=true;
int count=0;
game ()
{
while (true)
{
a=list.get(num);
System.out.println(a.getInfo());
//System.out.println("WTF");
//System.out.println(a.getDeciSize());
//System.out.println(a.getidSize());
//System.out.println(a.getDeci());
while (a.getDeciSize()>count)
{
System.out.println(count);
System.out.println(a.getcid(count)+  "   " + a.getDec(count));
count++;
}
while (flag)
{
temp= scan.nextLine();
for (int j=0; j<list.size(); j++)
{
if (temp.equals(list.get(j)))
{
flag=false;
num=j;
}
}
System.out.println("Enter valid input");
}
count=0;
flag=true;
}
}
}

Spoiler: File it is pulling from (click to show/hide)

Code: [Select]

info
You are to report to Claudius in the throne room.  What do you do?
YASD
dec
1Go to throne room
report
2Ignore summons
ignore
3Give a speech about how depressing life is
sulk
break
info
1You learn why it is unmanly to sulk about the natural order of life.  After a brief debate in which you showed the man why you have every right to sulk, you leave and continue to sulk.  But wait! Your friend approaches with two guards!
report
dec
5Go with them to investigate an apparent apparition of your father
investigate
6You have no other option! They have come to arrest you! To arms!
fight
break
info
2You decide to go sulk in a corner and lament on the death of your father, and his inferior replacement.  You are then interrupted by your friend and his two guards.
ignore
dec
6They know too much about your inner feelings! Kill them!
fight
5Go with them to investigate an apparent apparition of your father
investigate
break
info
3You comment to absolutely no one (Talking to imaginary people like stage audiences is a sure sign of insanity) about the sudden mariage of your uncle/father in law and your mother/aunt.
sulk
dec
5Go look for your friend, Horatio, and see if he has anything productive to do.
investigate
6Go fight some random guards
fight
break
info
6You are apparently an expert swordsman, despite no evidence of you practicing being shown.  You quickly take down several guards before you are overwhelmed.
fight
dec
Go back to beginning
YASD
break
end


The only thing my main does is create a game object. 

[SolarShado]

I hate coming again so soon after my previous problem with the same program, but I've spent almost my entire day after getting home trying to fix this with no success.  The problem is that when I'm creating a list of dec classes, the arraylist ids and deci are not being created with anything in them.  The output I get is just the very first info "You are to report to Claudius in the throne room.  What do you do?" 
-- snip --
The only thing my main does is create a game object.

I'm looking at things now. Still working on figuring out how it's supposed to work. Why, oh why, are all of the variables in reader declared at the class level?

I could go on and on with style tips/code review stuff if you're interested.

Will hopefully post again soon with assistance.

EDIT instead of double-post:

In reader's constructor, you're re-using the same ArrayLists over and over. Think about that for a moment before you open the spoiler.

Spoiler: Why is that bad? (click to show/hide)

Because each dec instance gets a reference to the same 3 lists, and the lists are cleared and reused.

Spoiler: How to fix? (click to show/hide)

Couple options:
Have dec's constructor make a copy (this is generally called "defensive copying", and almost always what you want to do when you get a reference to a mutable object in a constructor).
Create a new ArrayList when you need to start over with a blank list instead of calling clear().