File & split

Ruby
1

hi everyone,
I’m very, very fresh in ruby so
I’m looking for help with a small problem. I’ve got a log file from wget
and I have to evaluate average download speed when downloading is still
going, so I’m trying to do this

File.open(name) do |file|
while line=file.gets
tab=%w(line.split)
end
end
but how can I evaluate this 8th column from wget-log each line, I’m not
even sure about this few lines above

2

Logan C. wrote:

this line is almost certainly wrong, what you wanted was probably
tab = line.split
to get the value of the 8th column you’d do
eighth_column = tab[7]

thx for quick answer
hehe you’re right I was trying this but eclipse with DLTK is not to good
for ruby, it’s showing wrong results I think I will use vim like for
bash scripting :slight_smile:
but I still don’t know how to put together all this numbers

3

On 5/1/07, Marcin K. [email protected] wrote:

hi everyone,
I’m very, very fresh in ruby so
I’m looking for help with a small problem. I’ve got a log file from wget
and I have to evaluate average download speed when downloading is still
going, so I’m trying to do this

File.open(name) do |file|
while line=file.gets
tab=%w(line.split)

this line is almost certainly wrong, what you wanted was probably
tab = line.split
to get the value of the 8th column you’d do
eighth_column = tab[7]

4

On 5/1/07, Marcin K. [email protected] wrote:

for ruby, it’s showing wrong results I think I will use vim like for
bash scripting :slight_smile:
but I still don’t know how to put together all this numbers

I’ m not sure what you mean by “put together all this numbers.” A good
thing to do when you are trying to write a program is to play with it
irb.
You get immediate feedback.

5

Marcin K. wrote:

I’ve got this few lines
happens, all I want is to add one number to another (evaluate it)

Two things:

a) It’s “+=” not “=+”
b) You probably need to convert c8 to a number before you can add it

puts sum += c8.to_i

6

Logan C. wrote:

but I still don’t know how to put together all this numbers

I’ m not sure what you mean by “put together all this numbers.” A good
thing to do when you are trying to write a program is to play with it
irb.
You get immediate feedback.

I’ve got this few lines
while line=file.gets
tab=line.split
c8=tab[7].to_f
end
and it works. Results of is it’s like that
22121.12
4232.1
42353.90
322.0
when I’ll add line like this “puts sum=+c8” just before end nothing
happens, all I want is to add one number to another (evaluate it)

7

Tim H. wrote:

a) It’s “+=” not “=+”

yep it’s working better then before :slight_smile:

b) You probably need to convert c8 to a number before you can add it
puts sum += c8.to_i

I’ve done it in this line “c8=tab[7].to_f” but I still don’t know how to
divide sum by amount of rows :slight_smile:
eeeh it’s a crazy work, and it’s a bit late :slight_smile:

8

Oops, forgot to include the +=

i = 0
while line=file.gets
tab=line.split
c8+=tab[7].to_f
i = i + 1
end
puts c8 / i

9

How about this:

i = 0
while line=file.gets
tab=line.split
c8=tab[7].to_f
i = i + 1
end
puts c8 / i

10

ok, guys I solved this very tough problem :slight_smile:
and this is a solution for someone who will need it for any reason, but
I have another question how can I do this code more Ruby (I mean more
solid and nice in ruby style) because it seems for me very vulgar
sum=0.0
count=0
impr_count=0
if ARGV[0]!=nil then
File.open(ARGV[0]) do |file|
while line=file.gets
if line=~(/^([0-9]+)K/&&/%/)
count+=1
end
impr_count+=1
tab=line.split
c8=tab[7].to_f
sum+=c8
end
eval=impr_count-count
puts
puts “Av. download speed: #{sum/count} KB/s”
print "I’ve read #{count} proper & "
eval>1 ? (puts “#{eval} improper lines”) : (puts “#{eval} improper
line”)
puts
end
else
puts
print “Corupted or missing file or file path!!!\n\tPlease repeat
command with correct data\n”
puts
end