From Bash to Ruby

rasat · 2006-05-08 04:36:42

Trying to learn Ruby but when developing simple apps I am spending more time searching basic Ruby commands in Internet than doing the work. In Internet Ruby documenations are either too newbie or advance and very few samples.

To get the basic Ruby what commonly used in developing, here is list of Bash syntax I would like to have an equal Ruby.

Example.

# Bash
if [ -f "file.txt" ]; then
else
if

# Ruby:
if(FileTest.exists? "file.txt")
else

List of Bash syntax:
cat file.txt
grep "hello" file.txt
sed 's/hello/hello world/g' file.txt
awk '{ print $2 }' file.txt
echo "hello" > file.txt
echo "world" >> file.txt

cactus · 2006-05-08 04:50:01

A good start. Quick reference..
http://www.zenspider.com/Languages/Ruby/QuickRef.html

Good examples
http://pleac.sourceforge.net/pleac_ruby/index.html

Ruby Language docs.
http://www.ruby-doc.org/core/
http://www.ruby-doc.org/stdlib/

I will do one for ya.

Bash: cat file.txt
Ruby:

puts IO.read("testfile")

jochen · 2006-05-08 05:53:52

# grep "hello" file.txt
puts IO.read('file.txt').grep(/hello/)

# sed 's/hello/hello world/g' file.txt
puts IO.read('file.txt').gsub('hello','hello world')

# awk '{ print $2 }' file.txt
puts IO.readlines('file.txt').map{ |r| r.split[1] }

# echo "hello" > file.txt
File.open('file.txt','w'){ |f| f.puts "hello" }

# echo "world" >> file.txt
File.open('file.txt','a'){ |f| f.puts "world" }

rasat · 2006-05-08 16:58:25

Thanks guys for the input.
I am setting up a Ruby and Glade page.
http://user-contributions.org/wikis/use … y-Libglade

For your information this what I am working on:
http://user-contributions.org/projects/ … kginfo.jpg

rasat · 2006-05-13 20:09:50

jochen wrote:

# grep "hello" file.txt
puts IO.read('file.txt').grep(/hello/)

How to grep a variable? In ".grep(/hello/)" cannot use a variable.
# grep $var file.txt

rasat · 2006-05-14 19:05:03

Thanks.
This what I got from an other forum.

puts IO.read('file.txt').grep(/#{$var}/

Setting up a Bash to Ruby page:
http://user-contributions.org/wikis/use … sh-to-Ruby

Arch Linux

#1 2006-05-08 04:36:42

From Bash to Ruby

#2 2006-05-08 04:50:01

Re: From Bash to Ruby

#3 2006-05-08 05:53:52

Re: From Bash to Ruby

#4 2006-05-08 16:58:25

Re: From Bash to Ruby

#5 2006-05-13 20:09:50

Re: From Bash to Ruby

#6 2006-05-14 19:05:03

Re: From Bash to Ruby

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