append new line to textfile

[Mmcolli00 Mom]

I want to create a text file and append a new line to the text file
everytime a new logline is completed, my program iterates and gives a
new log every few hours.

this is an example of my logline:
logline: 'completed' starttime 04:00 endtime 23:00

my goal is to have a text file populated with the following
'completed' starttime 04:00 endtime 22:00
'completed' starttime 06:00 endtime 01:00
'completed' starttime 05:00 endtime 23:00
'completed' starttime 09:00 endtime 23:00

so far this is my method...yes, I am a beginner. Thanks in advance. MC

File.open('logfile.txt')do |f1|
f1.logline
end

 

[Shane Emmons]

[Note: parts of this message were removed to make it a legal post.]

I want to create a text file and append a new line to the text file
everytime a new logline is completed, my program iterates and gives a
new log every few hours.

this is an example of my logline:
logline: 'completed' starttime 04:00 endtime 23:00

my goal is to have a text file populated with the following
'completed' starttime 04:00 endtime 22:00
'completed' starttime 06:00 endtime 01:00
'completed' starttime 05:00 endtime 23:00
'completed' starttime 09:00 endtime 23:00

so far this is my method...yes, I am a beginner. Thanks in advance. MC

File.open('logfile.txt')do |f1|
f1.logline
end

File.open('logfile.txt', 'w+') do |f1| f1.write(logline)
end

 

[Siep Korteling]

File.open('logfile.txt', 'w+') do |f1| f1.write(logline)
end

This will destroy the content of logfile.txt. For appending to a file
instead of overwriting it, use "a"

3.times do |n|
logline = "logline #{n}"
File.open('D:/temp/logfile1.txt', 'w+') do |f1|
f1.puts(logline)
end
File.open('D:/temp/logfile2.txt', 'a') do |f1|
f1.puts(logline)
end
end

hth,

Siep

 

[Rob Biedenharn]

File.open('logfile.txt', 'w+') do |f1| f1.write(logline)
end

Eek! No, that's for a read/write file. You want a mode of 'a' for
append. All write operations will first reposition to the end-of-file.

-Rob

Rob Biedenharn http://agileconsultingllc.com
(e-mail address removed)

 

[Shane Emmons]

[Note: parts of this message were removed to make it a legal post.]

This will destroy the content of logfile.txt. For appending to a file
instead of overwriting it, use "a"

3.times do |n|
logline = "logline #{n}"
File.open('D:/temp/logfile1.txt', 'w+') do |f1|
f1.puts(logline)
end
File.open('D:/temp/logfile2.txt', 'a') do |f1|
f1.puts(logline)
end
end

hth,

Siep

whoops, sorry about that.