When file gets closed in a block

ruby-talk
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

···

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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

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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

···

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4

Close, try it like this:

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

-Rob

Rob Biedenharn http://agileconsultingllc.com
Rob@AgileConsultingLLC.com

···

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

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