How do I exit from a block

[Jigar Gosar]

base_dir = "C:/pde"

def list base_dir
d= Dir.new base_dir
d.each {|x|
return "asd" if x.eql? "."
return "asd" if x.eql? ".."
puts "Got #{x}"
full_name = base_dir+"/"+x
if(File.directory?(full_name))
list full_name
end
}
end

puts ( list base_dir)

The return inside the block in the "list" method actually return from
the "list" method itself. But i just wanted to exit the block. how does
one exit from a block in ruby?

please advise.

 

[Stefano Crocco]

Alle marted=C3=AC 13 novembre 2007, Jigar Gosar ha scritto:

base_dir =3D "C:/pde"

def list base_dir
d=3D Dir.new base_dir
d.each {|x|
return "asd" if x.eql? "."
return "asd" if x.eql? ".."
puts "Got #{x}"
full_name =3D base_dir+"/"+x
if(File.directory?(full_name))
list full_name
end
}
end

puts ( list base_dir)

The return inside the block in the "list" method actually return from
the "list" method itself. But i just wanted to exit the block. how does
one exit from a block in ruby?

please advise.

You should use break instead of return.=20

Stefano

 

[Robert Klemme]

base_dir = "C:/pde"

def list base_dir
d= Dir.new base_dir
d.each {|x|
return "asd" if x.eql? "."
return "asd" if x.eql? ".."
puts "Got #{x}"
full_name = base_dir+"/"+x
if(File.directory?(full_name))
list full_name
end
}
end

puts ( list base_dir)

Why do you use "puts" here? As far as I can see you do the printing in #list.

The return inside the block in the "list" method actually return from
the "list" method itself. But i just wanted to exit the block. how does
one exit from a block in ruby?

please advise.

Not exactly the answer you were looking for, but...

15:21:46 /$ ruby -r find -e 'Find.find("/tmp") {|f| puts f}'
/tmp
/tmp/uscreens
/tmp/uscreens/S-rklemme
/tmp/4052
/tmp/4052/sshlog
/tmp/4052/servicelog
/tmp/4052/runlog
/tmp/4052/keylog
/tmp/.X11-unix
/tmp/.X11-unix/X0

Cheers

robert

 

[Damien Merenne]

Not exactly the answer you were looking for, but...

15:21:46 /$ ruby -r find -e 'Find.find("/tmp") {|f| puts f}'
/tmp
/tmp/uscreens
/tmp/uscreens/S-rklemme
/tmp/4052
/tmp/4052/sshlog
/tmp/4052/servicelog
/tmp/4052/runlog
/tmp/4052/keylog
/tmp/.X11-unix
/tmp/.X11-unix/X0

Or even

Dir["/tmp/**/*"]

see http://www.ruby-doc.org/core/classes/Dir.html#M002348

Regards,

 

[Jigar Gosar]

def list base_dir, prefix
Dir.foreach(base_dir){|file|
if (file.eql? "." or file.eql? "..")
puts "break dosent work either"
break
end

# this if is the only solution i found, but its ugly.
if !(file.eql? "." or file.eql? "..")
puts "Got #{prefix+file.gsub(/.java$/,"")}" if file =~ /.*\.java$/
full_name = base_dir+"/"+file
if(File.directory?(full_name))
list full_name, prefix+file+"."
end
end
}
end

list "c:/java/", ""

break not only exited the block but also prevented execution with the
next file in the directory, break actually broke the foreach loop
entirely, I just wanted something like continue
please advise.

I am trying to recurse all directories and find certain type of files.

 

[Jigar Gosar]

15:21:46 /$ ruby -r find -e 'Find.find("/tmp") {|f| puts f}'
/tmp
/tmp/uscreens
/tmp/uscreens/S-rklemme
/tmp/4052
/tmp/4052/sshlog
/tmp/4052/servicelog
/tmp/4052/runlog
/tmp/4052/keylog
/tmp/.X11-unix
/tmp/.X11-unix/X0

Cheers

robert

Find look intresing, will solve my problem, thanks.

But I still need a way to exit from a block

 

[Jigar Gosar]

Thanks a lot, this is so cool, how did I miss it

my code has reduced to

Dir["C:/pde/cvshome/trunk/OBox/**/src/core/**/*.java"].each{|f|
file = f.gsub(/.*\/src\/core\//,"")
file = file.gsub("/",".")
file = file.gsub(/.java$/,"")
puts file
}

Any way to shorten it further??

/tmp/uscreens/S-rklemme
/tmp/4052
/tmp/4052/sshlog
/tmp/4052/servicelog
/tmp/4052/runlog
/tmp/4052/keylog
/tmp/.X11-unix
/tmp/.X11-unix/X0

Or even

Dir["/tmp/**/*"]

see http://www.ruby-doc.org/core/classes/Dir.html#M002348

Regards,

 

[Robert Klemme]

def list base_dir, prefix
Dir.foreach(base_dir){|file|
if (file.eql? "." or file.eql? "..")
puts "break dosent work either"
break
end

# this if is the only solution i found, but its ugly.
if !(file.eql? "." or file.eql? "..")
puts "Got #{prefix+file.gsub(/.java$/,"")}" if file =~ /.*\.java$/
full_name = base_dir+"/"+file
if(File.directory?(full_name))
list full_name, prefix+file+"."
end
end
}
end

list "c:/java/", ""

break not only exited the block but also prevented execution with the
next file in the directory, break actually broke the foreach loop
entirely, I just wanted something like continue
please advise.

That would be "next". Note that exiting from a block and switching to
the next iteration is something completely different. You asked for
exiting and thusly were correctly referred to "break".

Cheers

robert

 

[Jigar Gosar]

Thanks for clearing that up, I am thoroughly impressed with the ruby
community, best in world. Even professional support is slower.

I am a young convert from java

 

[Damien Merenne]

my code has reduced to

Dir["C:/pde/cvshome/trunk/OBox/**/src/core/**/*.java"].each{|f|
file = f.gsub(/.*\/src\/core\//,"")
file = file.gsub("/",".")
file = file.gsub(/.java$/,"")
puts file
}

Any way to shorten it further??

If you want only the name of the file, use

puts File.basename(f, ".java")

Best,