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I have a logger to print to a file:
logger = Logger.new Rails.root.join 'log/my.log'
How can I print several dots in one line in different logger calls?
i.e., if I do
some_array.each do |el|
logger.info '.'
el.some_method
end
These dots will be printed in different lines.
314
Puts automatically adds a new line at the end of your message every time you use it. If you don't want a newline, then use print .
We can also use "\n" ( newline character ) to print a new line whenever we want as used in most of the programming languages. Let's see an example. \n is the newline character. It prints a new line.
"\n" is newline, '\n\ is literally backslash and n.
In a Rails app, logs are stored under the /log folder. In development mode, the development. log file is used & you see log output on the terminal you're running rails server on.
The << method lets you write messages without any formatting the log file.
For example:
require 'logger'
log = Logger.new "test.log"
log.info "Start"
5.times { log << "." }
log << "\n"
log.info "End"
Produces:
I, [2014-03-10T15:11:04.320495 #3410] INFO -- : Start
.....
I, [2014-03-10T15:11:42.157131 #3410] INFO -- : End
Unfortunately, this doesn't let you write to the same line as previous calls to log.info
139
You can use Logger#<<(msg)
Dump given message to the log device without any formatting. If no log device exists, return nil.
some_array.each do |el|
logger << '.'
el.some_method
end
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