Friday, November 13, 2009

Familiar? Forget it!


If it's familiar to you - u should try Google Go language. As developers write - you will forget about killing time waiting for compile. For example If A.go depends on B.go depends on C.go:
- compile C.go, B.go, then A.go.
- to compile A.go, compiler reads B.o not C.o.
At scale, this can be a huge speedup.

"Hello world!" program on Go

Hello again :)

Now i will teach u to write our firs Hello World! program on Go language. And, i'm sure, that you like Go as it did I. So let's start!

So make file, and name it hello.go. Open it with any of text editors and paste (or write - as u want) those code:


package main

import fmt "fmt"


func main() {
fmt.Printf("Hello, world!\n");
}

and save it. Than in terminal enter (with command cd) into directory, where you save Hello World! file, and write in terminal:

8g hello.go
8l hello.8
./8.out


ATTENTION! If it didn't works instead 8 write 6. It's for the 64-bit x86 systems. If u have 32-bit x86, and more - it should work with 8.

You'r a cool Go programmer now ;) Wait for a new tutorials and don't forget to subscribe! :)

How to install Go (GoLang) compiler on Ubuntu

Now i want to write tutorial how to install GoLang compiler on Ubuntu (no matter what: it can be jaunty jackalope, karmic koala or even hardy heron). So lets start!

So at first step you should go into terminal and write
export GOROOT=/home/your_name/hg

This will write into var $GOROOT your path where Go will be installed. But dont make this dir (/hg) - program will make it.

Then you should define other vars:
export GOOS=linux
export GOARCH=386

NOTE! In var $GOARCH you should write your processor architecture! For example: export GOARCH=amd64 or GOARCH=arm

The next step will be creation of /bin folder and addind 777 permission for it. So in your folder (/home/name) create "bin" directory and in the terminal write
chmod 777 /home/your-name/bin
export GOBIN=/home/your-name/bin
export PATH=$PATH:/home/your-name/bin

If you do all the right way - you will see
GOBIN=/home/your-name/bin
GOARCH=386
GOROOT=/home/your-name/hg/
GOOS=linux

when you write
env|grep '^GO'
in the terminal.

Then you shoul fetch Go source files from repo. In this situation helps Mercurial.
sudo apt-get install mercurial
hg clone -r release https://go.googlecode.com/hg/ $GOROOT

The second line will recive source code.

As you know, Go was written on C language, so you need to install C compiler (gcc) to compile Go. So in terminal write:
sudo apt-get install bison gcc libc6-dev ed


Then the last two steps. Just write in terminal
cd $GOROOT/src
./all.bash

and wait. If you all the same way as i describe - you will see something like that:
--- cd ../test
n known bugs; 0 unexpected bugs


In the next post i help you to write your first programm on Go!

Hello world!

Hi people! This blog will be about new and very perspective programming language - Go or GoLang. This language was deleloped by Google to make easier work of programmists.

And now i want to write a few words about me.

My name is Basil (in my coutry it will be Vasyl) Melnychuck, I'm from Ukraine (NOT RUSSIA!!!), Lviv. Now I study in Lviv National University named after Ivan Franko, on electronics facultet. Now i write code on PHP and MySQL languages. That's all :)

PS. Sorry for mistakes, i dont know English good :)