Guys, write the most favourite programs of all times……HelloWorld !!!! in which ever programming language on earth you know.

This post is in intention to make people out there comfortable to start coding in a language.  So, please write the tools required to be installed to get started and also do comment on the programs you write.

If someone is missing real “Hello, World” program written in a shader language, here it is.

Pixel shader HLSL, shader model 3.0  (in effects file); pixel shader only, that takes as input only u,v.

More serious challenge could be to write Quine program, but I have other things to do.

const int L[18]={
	0xad27,	0xa925,	0xED25,	0xa925,	0xaDB7,	0x0000,
	0x85eE,	0x852b,	0xad2b,	0xf92e,	0x712b,	0x51e9,	0x0000,
	0xC3CF,	0xc36f,	0xc326,	0xc360,	0xf3cf
};
float4 PS(float2 tex : TEXCOORD0):COLOR0
{
	float4 output = float4(0,tex.x,tex.y,1);
	int x= (1-tex.x)*16;
	int y= (1-tex.y)*18;
	//no bitwise ioerations on shadermodel 3 yet 
	int mask=L[y]*2;
	for (int i = 0; i<16&& i <x; i++)
		mask*=0.5;output.r = ( frac(0.5*mask) < 0.1);
	return output;
}

And so I thought I’d create a little space on the web where I could make notes and pass comment on aspects of software development.

Let’s see how this develops…

Seperti yang sudah saya katakan di tulisan sebelumnya, saya baru-baru ini beralih ke sistem operassi linux,

Linux, aku ingin tahu

karena itu baru-baru ini saya mencoba buat program C di Ubuntu yang saya punya, maklum menurut pengetahuan saya
Linux ini sangat dekat dengan C. Ya sih, sebelumnya-sebelumnya pernah sih belajar C, tapi itu di sistem operasi
bukan Linux, disana untuk bisa buat program C kudu install program yang namanya Borland apaa gitu,,
Terus gimana ya kalo di Linux,,?? Pertama cari info dulu sih, gimana caranya..

Baca baca, nah aku dapat. Ternyata di linux itu buat bikin program C sudah nggak butuh install apapun,
karena secara default Linux udah nyedia-in compiler C, namanya GNU Compiler Colection atau biasa dikenal GCC.

Habis itu, langsung aja buka gedit, its time to coding… (hihii)
Program yang di buat tahu nggak,,, Nampilin Hello World,, (Hihii..) Karena kebiasan di Java, kalau mau
ngetes udah bisa ato belum compile terus jalanin programnya..
Aku yakin semua udah pada hafal sama tuh program yang satu itu.. Tapi ini versi C, neh code-nya :

#include <stdio.h>

main()
{
printf("Hello World\n");
}

Setelah itu aku simpan dengan nama HelloWorld.c

Selanjutnya proses compile pake GCC tadi, perintah compile-nya

gcc -o HelloWorld HelloWorld.c

dari perintah compile ini, menghasil file executable bernama HelloWord.out
Kemudian file executable-nya di run pake perintah

./HelloWorld

Hasilnya, so pasti text “HelloWorld” nongol,,
Great..!!!, kesimpulannya berhasil,, berarti saatnya buat program yang lebih keren..!!!

Ok deh, udah dulu ya….

HelloWorld Chat is a project I’ve been working on with my friend and designer extraordinaire Aviva. Basically it’s a “chat online with a stranger” site like Omegle & co, but we try to match between users from different countries (based on their IP address). Once we reach a certain level of traffic, we could start adding more sophisticated matching rules and connect between users of specific nations, based on current world events and so on.

We haven’t done much in way of publicizing the site, so it was great to be accepted into Stanford’s Peace Dot directory. Peace Dot only adds one organization per day to the directory, and we’re excited to finally get in They even do a little welcome video for each site, here’s Standord’s BJ Fogg welcoming us:

Thanks, Peace Dot!

Technically, HelloWorld is a simple Google App Engine based chat, written in Python. The focus was less on the chat code and more on making the application easy to customize and adapt for various sites. The look can be completely changed by editing two HTML files, and being App Engine based makes deployment extremely simple and cheap.

Sites built on top of HelloWorld might be used to foster dialog between sides in a conflict, aid in reconciliation phases, or help people going through their own struggle with a disease or addiction talk with others in the same situation. The anonymity allows users to speak frankly where it may often be difficult or dangerous to do so, and hopefully some may later move on to talk via Skype or Email – our goal is to be the easily accessed and risk free gateway to a dialog.

While forums and multi-user chats have important roles, a one to one conversation has a unique value of its own. Talking one to one makes slogans and cliches a lot harder to hide behind. It is a lesson I learned myself in the summer of 2006, when I happened into an IM conversation with a Lebanese person while both our parents’ towns were under fire by the other side. That experience was the inspiration for HelloWorld, I hope this tool would allow many more such conversations to take place.

Hai sobat kali ini kita bahas kode java pertama kita, yaitu mencetak sebuah kata dengan program javayang sederhana ini. Hubungannya dengan judul diatas ? Yup judul diatas yang saya maksud ialah sebuah kata yang biasa di lakukan oleh orang yang pertama kali mencoba Java kata tersebut yaitu “Hello World.

Untuk mencetak kata tersebut sangat mudah sekali, hanya butuh beberapa baris saja untuk menuliskan kode-kode Java tersebut.

Untuk tempat penulisannya kita bisa menggunakan text editor bawaan masing-masing OS, tapi mungkin ada kekurangannya seperti warna untuk texts yang membedakan antara kode satu dengan lainnya, saya merekomendasikan menggunakan EditPlus

public class HelloWorld{
 public static void main(String args[]){
 System.out.println("Hello World");
 }
}

untuk menjalankannya pertama yang harus di lakukan ialah mengcompilenya karena kode java yang kita tulis harus menjadi byte code yang bisa di baca oleh mesin, bisa anda baca di artikel fase-fase pemograman java kita bisa menggunakan command prompt di windows atau terminal di linux untuk melakukan compile terhadap file tersebut.

gunakan perintah javac HelloWorld.java untuk melakukan compile terhadap file java HelloWorld.java dan gunakan perintah java HelloWorld untuk menjalankan program HelloWorld tersebut. Artinya ketika kita menggunakan perintah javac HelloWorld.java kita mengcompile file tersebut dan membentuk file HelloWorld.class dan perintah java HelloWorld untuk menjalankan program tersebut, mungkin yang jadi pertanyaan kenapa pada saat menjalankan perintah java HelloWorld tidak menggunakan extension .class, karena file tersebut sudah menjadi bytecode yg bisa dibaca oleh mesin jadi kita menjalankannya menggunakan perintah java HelloWorld

* untuk penjelasan kode-kode diatas akan saya bahas di postingan selanjutnya.

This is the beginning of a blog which I hope will help promote awareness of the environmental quality in Baton Rouge. We really do have a naturally beautiful city, but in the modern age there are many threats which jeopardize its future. By recognizing these threats and making them part of the public debate, we can better address them. To that end, this blog will post relevant news relating to Baton Rouge’s environment as well as possible solutions to our current challenges.

So with these ambiguous words, we begin.

Este é o blog da TV digital Cultura Digital.

Comecei com a idéia de publicar um blog falando sobre TV DIGITAL. Assunto que muito me interessa, e que está sendo muito discutido, mas as informações ainda são de difícil acesso. Venho pesquisando sobre TV digital já a algum tempo. Para ser mais preciso, desde o início de 2007 assim que começaram as primeiras repercussões da escolha do padrão de transmissão da TV digital aberta brasileira.

Mas navegando um pouco procurando sobre o assunto comecei a me envolver cada vez mais na chamada CULTURA DIGITAL, e então percebi que a discussão é muito mais ampla.

Na idéia original eu já tinha em mente que não queria falar sobre códigos fonte e linguagens de programação, meios de transmissão e coisas deste tipo. O que eu realmente gosto sobre a TV digital é o impacto que ela traz na sociedade e a INOVAÇÃO tecnológica que ela representa e a INTERATIVIDADE que ela possibilita. Percebi que isso se trata mais de Cultura Digital do que só TV digital.

Então, espere encontrar aqui informações não somente sobre TV, mas tudo que envolva TECNOLOGIA, INOVAÇÃO, INTERATIVIDADE E CULTURA.

Espero que goste e fique a vontade para comentar.

Abraços

@rafaelcs

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HelloWorld!

Bom… na verdade é 42, mas pelo menos foi isso que o meu computador
mostrou em minha área de trabalho hoje pela manhã. Não é uma saudação
de um blog virgem do WordPress, nem aquelas primeiras páginas que os
noobs em HTML criam nas aulinhas da Microcamp. A mensagem apareceu
ali, na minha área de trabalho, num simples documento do bloco de
notas, aka txt!

É engraçado como às vezes tratamos nossos computadores como gente. Já
me peguei várias vezes, quando notava algum problema ou aquecimento no
PC, pensando assim – “melhor deixá-lo descansando um pouco… vou
desligá-lo e depois, ligo denovo, pra ver se o problema sumiu”. Como
se realmente eles soubessem o que se passa ao redor deles, ou o que
pensamos sobre eles…

Mas voltando ao bloco de notas, desgraça pouca é bobagem… na
verdade, nem notei o arquivinho ali, perdido no canto direito superior
da tela com meu belo wallpaper do Marvin (The Paranoid Android!) –
levei um susto mesmo quando vi que todos, TODOS os atalhos do meu
Desktop haviam desaparecido. Pensei que o Windows estava demorando pra
carregar tudo e então, para desafogar o coitado, lá fui eu reiniciar o
sistema.

Iniciar – Desligar o Computador – Reiniciar… Windows denovo e…
nada. Foi só nessa segunda vez que notei o bloco de notas com o
atípico nome HelloWorld!.txt.

Sabendo que eu não havia criado páginas em HTML e nem o tal txt, como
aquela coisinha foi parar ali? Não pensei muito nisso e abri logo o
arquivo. Tudo parecia mais um documento de sistema (com aqueles
quadrados brancos, mostrando que o notepad não podia mostrar algumas
letras ou símbolos). Foi somente depois de deslizar a barra de
rolagem, que notei algo escrito com letras compreensíveis, finalmente.
Apenas três linhas de texto, que diziam:

>> connect to… machine accounts
>> learn portuguêis
>> dot dot… next.

Bom, a primeira coisa que reparei é que meu PC é realmente burro (ou a
pessoa que colocou esse arquivo lá, também). Pior do que “portuguêis”
é só o “portugueix” das miguxas de plantão. O mais estranho é essa
história de connect to machine accounts. Alguém tem idéia do que possa
ser? Talvez seja algo relacionado à minha conexão com a internet, que
andou capenga nos últimos dias, como já comentei aqui.

Em todo o caso, deletei o arquivinho, passei uns anti-vírus ultra
potentes aqui e ainda removi todo e qualquer programa suspeito ou
inútil do meu PC… vamos ver se resolve. *Ah, e graças a Deus só os
atalhos dos programas foram apagados – os originais continuam
funcionando, em plena glória! Amém!

Since the environment has been set up successful, the next step is to write a simple JavaEE Hello World application. Therefore we’ll use a simple Java WebStart client which which will call a stateless EJB to log Hello World. First create a new Enterprise Application Project, then an EJB Project and then a Java Web Client Project. It is mostly just clicking through the wizards. Create a class in the EJB Project, add a method printHelloWorld and call it from the Java Web Client Project. A tutorial can be found here.

Intentant passar una tarda de diumenge sense sucumbir a bastantes coses lleugerament callades.

Vuelvo a casa cansado, muy cansado. No por lo que hoy representa en mi vida ya que esto lo podria haber escrito hace dos dias o dos semanas, pero no hace un més.

Dicen que es natural en muchas personas la necesidad de canvio, tanto es así que incluso en política (este articulo no lo es) la palabra canvio es empleada sin tor ni son con demasiada frecuencia por algunos y poco por otros.

Canviar de casa, canviar de marido, de traje, de falda, de candidato, de plantas o muebles, de amigos, o canviar de alguien (que no a alguien)

Et cela est ce qui arrive quand dans le contrat que tu signes quand tu décides d’être gay, quand tout ami que tu aimes comme tel, comme l’ami que tu apprécies tu loues, tu défends ou admires, croit que l’on fait la cour de lui

Quando dicho lo anterior cursivo, te sorprendes de este hecho no probable pero si intuible, no puedes hacer nada mas que entrar en una boragine de hartazgo que demuestra lo paranoico que uno és, y lo sorprendente que es la gente que de tanto imaginar termina por desvariar.

En fin esto no iba de esto.

El proximo jueves 15 de octubre a partir de las 16.30h presentaremos el proyecto en Medialab Prado en busca de nuevas colaboraciones. Despues de las presentaciones habra una conferencia del artista estadounidense Zachary Lieberman (se puede seguir por streaming aqui)

Ha habido cambios tecnicos y en el desarrollo del prototipo no vamos a usar finalmente NUPLAY como constructor del espacio escenico, sino que desarrollaremos una nueva escenografia digital jugable en PURE DATA.

Desde el pasado jueves 17 septiembre, HelloWorld (convocatoria de artes escénicas y nuevas tecnologías de Medialab Prado) ha hecho pública una llamada a la colaboración en los ochos proyectos seleccionados, con la intención de completar e implementar nuevos perfiles en cada uno de ellos.

En Homeward Journeys  estaríamos encantados de dar la bienvenida, para  integrarse en el grupo de trabajo del proyecto,  a cualquiera de los siguientes perfiles colaboradores:

A nivel gráfico expertos/interesados en:
-    gráficos 3d / entornos virtuales (Quake 4 Level Editor)

A nivel técnico expertos/interesados en:
-    MIDI
-    Audio analysis (FFT)
-    Arduino (RFID)
-    Reactvision (tag detection)
-    Game controllers (wiimote)

A nivel escénico expertos/interesados en:
-    Guion / interpretación
-    Coreografía / danza

Pls Excuse Me While I Waffle

Computers are dumb, a bit like Fido. They have to be told what to do. ‘Ok, fetch’, ‘Chase the cat’, ‘go to sleep’.  We can train our digital Fido using statements and commands. If we put commands together into a series of steps, our digital friend will be able to do tricks, assuming he recognises each command. That series of steps is a program. When recorded, it forms a repeatable set of things to be done. Working with our digital Fido requires the ability to give him commands, something like a keyboard (or mouse), and a way for Fido to response, often by making a sound, or producing a response on a computer screen/panel/terminal or some such. Keyboard+display= simple, usable means of getting our ideas into the digital realm.

The name ‘Groovy’ describes a language syntax or set of commands we can put together to make something happen in a computer. There are a few things you’ll need to do in order to make your computer understand this set of commands. We’ll cover that later. I just want to give you a taste of Groovy, not bore you with technical details at this point.

Walking The Dog

It’s often useful to have your program talk to the outside world. Almost every computer language has some way to allow this. It’s often some variation of the word to show or display or print. Groovy uses the java approach, the print line command, or println, for short. What needs to be said is often enclosed in quotes, so the dumb computer will treat it as one statement.

So as promised, the Groovy way to say hello is :

println "Hello World"

and we should see a result like this :

Hello World

Hmmm. I didn’t know we could do something like this until i just tried it, but the results of your last command are returned to your computer screen, so if the last of a set of commands is just

“Hello World”

then the result is shown with the double quotes removed as the text moves to the screen :

Hello World

A simple sample, no doubt. But not much use really. Since a computer can hold a file of text, we often want to see what that text is. Textfiles are arranged into lines and given a name so the computer’s filing system can remember where it is. Text file names may have an appendix to the name that implies what’s in the file. This appendix is typically ‘txt’.

So now for the pasty resistance, let’s do something more complex; let’s print the content of a text file named readme.txt using a bit of Groovy :

String fn = "readme.txt"
File f = new File(fn)
int linecount = 0
f.eachLine{it -> println it; linecount += 1; }
println linecount+" lines"

and for desert, the output would look like this :

Mary
Harry
Why
Should I asked
Mary
5 lines

Kinda nice, yes ? and if we didn’t want to indicate a variable type, we could use a ‘def’ aka ‘define’ and code this :

def fn = "readme.txt"
def f = new File(fn)
def linecount = 0
f.eachLine{it -> println it; linecount += 1; }
println linecount+" lines"

or this ( look ma – no def’s ) :

fn = "readme.txt"
f = new File(fn)
linecount = 0
f.eachLine{it -> println it; linecount += 1; }
println linecount+" lines"

or if you’re lazy like me we could save a line and declare the filename this way :

f = new File("readme.txt")
linecount = 0
f.eachLine{it -> println it; linecount += 1; }
println linecount+" lines"

or reducing the number of lines of code, we could still run this too :

linecount = 0
new File("readme.txt").eachLine{it -> println it; linecount += 1; }
println linecount+" lines"

this is the minimum code fragment that will  do the trick :

linecount = 0
new File("readme.txt").eachLine{println it; linecount += 1; }
linecount+" lines"

Any of these code fragments will produce the same result :

Mary
Harry
Why
Should I asked
Mary
Result: "5 lines"

=====================

For something similar, we could use a collection – a sequence of ‘things’ and try :

somebox = []
new File("readme.txt").eachLine{ somebox << it + '\n' }
println somebox
println somebox.size()+" lines"

and the somebox variable stores every line from the textfile. We can then use the .size() method to discover the count of lines :

[Mary
, Harry
, Why
, Should I asked
, Mary
]
5 lines

Ok, not an exact match, but an alternative. It gives us a choice of how to do things.

Next time, i want to look at the Groovy setup requirements for Mac o/s, *nix choices like Ubuntu, and windows XP.

Felt i must introduce you to my new best friend, at least, the programming equivalent of it.

Why do i love to code Groovy ? It’s easy to express a quick solution in a few lines of code, and for me, after almost fifty years of writing COBOL code, my brain has nearly turned to rice pudding from writing huge lumps of english-like code just to express a logical solution to some problem or other that i can do in a few lines of Groovy. A COBOL overview follows, so kindly click on Groovy 101 to avoid falling asleep.

COBOL, you may or may not rememeber, was invented as a tool that programmers could use to develop and express solutions to common business oriented problems in a platform-independent way, and before you can say Grace Hopper, we had a high level language that was human-readable and portable between machines. We dumped the work of expressing our solutions onto the machine. Instead of writing thousands of lines of code in machine language, or it’s later cousin, assembler, which was extremely machine-friendly and man-hostile, we started to write in english and then use translators and compilers to interpret what the english would mean in computer-speak.

This, of course, forced the hardware providers to write compilers to do just that. Each vendor had their own flavor of COBOL. Burroughs had theirs, Honeywell, Univac and DEC had different flavors, RCA 301 and 501 systems had started earlier on their COBOL compilers, so they were a little less buggy. IBM had forms of COBOL on their 1401, 1620, 7040, 7090, S360, and later S/34-S/36-S/38 systems, and since they sold more machines, their version of COBOL became more acceptable. (Hitachi pitched in too).

Still, there were far too many versions of COBOL and each version had it’s own vendor-specific features making it a lot less portable than Grace first envisioned. Enter CODASYL. See http://en.wikipedia.org/wiki/CODASYL for an overview of what was needed. I made a fairly good living migrating different versions of COBOL between platforms.  To read more about the various incarnations of the COBOL specification, please google ‘american national standards institute 1960 cobol‘ .

My memories of Burroughs systems are quite nostalgic. Burroughs COBOL in the ’70s looked like this

http://bitsavers.org/pdf/burroughs/B1700/B1700_brochures/1058542_COBOL/1058542_COBOL_front_feb73.jpg

In COBOL, i had to code four divisions of statements. The IDENTIFICATION DIVISION spells out the program name. The ENVIRONMENT DIVISION declares the model of computer the program can run on, and associates the files to be used in this program with the type of external devices used by this program, i.e. punch cards, magnetic tape, etc. The DATA DIVISION has two sections, the first section describes file usage in more detail with variables for file-related purposes and the second section is for non-file related variables, or fields. The intended use of a field is declared in PICTURE statements. The final division is the PROCEDURE DIVISION where we code the actual logic to solve our problem using english-like statements.

Our typical ‘Hello World’ COBOL program requires a minimum set of statements like this:

IDENTIFICATION DIVISION.
PROGRAM-ID. HELLOWORLD.
ENVIRONMENT DIVISION.
CONFIGURATION SECTION.
    SOURCE-COMPUTER. IBM-360.
    OBJECT-COMPUTER. BURROUGHS-B1700.
INPUT-OUTPUT SECTION.
FILE-CONTROL.
DATA DIVISION.
FILE SECTION.
WORKING-STORAGE SECTION.
01 HELLO-MESSAGE PIC X(20) VALUE "HELLO WORLD".
PROCEDURE DIVISION.
LOGIC-1.
    DISPLAY HELLO-MESSAGE.
    STOP RUN.

A program to print out each line of an input text file plus a count of lines might look like this :

IDENTIFICATION DIVISION.
PROGRAM-ID. HELLOWORLD.
ENVIRONMENT DIVISION.
CONFIGURATION SECTION.
    SOURCE-COMPUTER. IBM-360.
    OBJECT-COMPUTER. BURROUGHS-B1700.
INPUT-OUTPUT SECTION.
FILE-CONTROL.
    SELECT README-FILE ASSIGN TO DISK
       ACCESS MODE IS SEQUENTIAL.
DATA DIVISION.
FILE SECTION.
FD README-FILE
    RECORD CONTAINS 1 TO 80 CHARACTERS
    VALUE OF ID IS "README.TXT"
    DATA RECORD IS RECORD-1.
01  RECORD-1.
    05  FIELD-NAME PIC X(80).
WORKING-STORAGE SECTION.
01 LINE-COUNT PIC S9(5) VALUE ZERO.
PROCEDURE DIVISION.
SOME-LOGIC-STATEMENTS.
    OPEN INPUT README-FILE.
PARAGRAPH-2.
    READ README-FILE AT END GO TO PARAGRAPH-123.
    DISPLAY FIELD-NAME.
    ADD 1 TO LINE-COUNT.
    GO TO PARAGRAPH-2.
PARAGRAPH-123.
    CLOSE README-FILE.
    DISPLAY LINE-COUNT " LINES".
    STOP RUN.

So you can see from these examples, the amount of supporting syntax to get the job done is similar to Java. Groovy gets the job done in fewer lines. Please see Groovy 101 for the Groovy equivalent code.