February 2018
Intermediate to advanced
340 pages
9h 43m
English
Content preview from Go Standard Library Cookbook
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How it works...
The log package provides the New function which simplifies the creation of a customized logger. The New function consumes the Writer, which could be any object implementing the Writer interface, the prefix in the form of the string, and the form of the logged message that is composed of flags. The last argument is the most interesting because with it, you are able to enhance the log message with dynamic fields, such as date and filename.
Note that the preceding example uses, for the first logger, the custLogger, the flags configuring the message to display the date and time in front of the log message. The second one, named the custLoggerEnh, uses the flag, Ldate and Lshortfile, to show the filename and date.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.