tempfile iterator?

[tony summerfelt]

what's the easiest way to iterate through a Tempfile?

basically i want to append the contents of a tempfile (created by
Tempfile.new) to the end of a regular file (created by File.open)

 

[Ara.T.Howard]

what's the easiest way to iterate through a Tempfile?

basically i want to append the contents of a tempfile (created by
Tempfile.new) to the end of a regular file (created by File.open)

t = Tempfile.new $$
t.puts 42
t.close
t.open

# or t.flush

open('file','a+'){|f| f.write t.read}

-a
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[tony summerfelt]

open('file','a+'){|f| f.write t.read}

i have a file '@lg' the file already exists, so i used:

tlf.open

open('@lg','a') {|f| f.write tlf.read}

but the contents of the temprorary file created as tlf were not
appended to the filename in '@lg'

did i miss something in your example?
http://home.cogeco.ca/~tsummerfelt1

 

[Mark Sparshatt]

i have a file '@lg' the file already exists, so i used:

tlf.open

open('@lg','a') {|f| f.write tlf.read}

but the contents of the temprorary file created as tlf were not
appended to the filename in '@lg'

if @lg is a variable holding the filename then that should be

open(@lg, 'a') {|f| f.write tlf.read}

The code you wrote would be trying to append to a file called '@lg'

 

[tony summerfelt]

if @lg is a variable holding the filename then that should be

open(@lg, 'a') {|f| f.write tlf.read}

The code you wrote would be trying to append to a file called '@lg'

yup. i figured that out when i applied some common sense...

for some reason, with that line it the thread is hanging...i might
have to rethink the way i've done things

http://home.cogeco.ca/~tsummerfelt1

 

[Robert Klemme]

yup. i figured that out when i applied some common sense...

for some reason, with that line it the thread is hanging...i might
have to rethink the way i've done things

Maybe you forgot to seek?

Note also, taht "f.write tlf.read" will slurp the whole file into mem
before writing it out again. This may or may not be a problem, depending
on the size of your file.

Taking this together you might want to do this:

# reset file position of the open Tempfile
tlf.seek 0

# copy in chunks
open(@lg,'a') do |f|
while ( data = tlf.read 1024 )
f.write data
end
end

Regards

robert