When file gets closed in a block

Ruby
1

I like to use this a lot:
File.new(cName,‘wb+’).write(‘aText’)

I have understood that file gets automaticly closed. But when? You can
not delete file right after above statement. If you want to delete file
you must use this.
f = File.new(cName,‘wb+’)
f.write(attachment.unpack(‘m’))
f.close

When does the file in block gets closed.

by
TheR

2

If you open a file with File#new, you have to close it yourself by
calling File#close.

f = File.new(‘someFilename’, ‘w’)
f.write(text1)
f.write(text2)
f.close

You can write as often as you like to f as long as you don’t close it.

File#open closes the file automatically if passed a block:

File.open(‘someFilename’, ‘w’) {|f|
f.write(text1)
f.write(text2)
}

Without a block File#open ist just an alias for File#new.

Sascha

3

You can write as often as you like to f as long as you don’t close it.

File#open closes the file automatically if passed a block:

File.open(‘someFilename’, ‘w’) {|f|
f.write(text1)
f.write(text2)
}

I guess then my one liner should look like this:

File.new(cName,‘wb+’) { |f|.write(‘aText’) }

by
TheR

4

On Jun 19, 2007, at 5:52 AM, Damjan R. wrote:

I guess then my one liner should look like this:

File.new(cName,‘wb+’) { |f|.write(‘aText’) }

by
TheR

Close, try it like this:

File.open(cName,‘wb+’) { |f| f.write(‘aText’) }

-Rob

Rob B. http://agileconsultingllc.com
[email protected]