Reading Files with a Buffer

Explore how to read files in Go by combining buffered reading with command-line flag parsing. Learn to handle user input, process file contents with buffered readers, and manage errors effectively during file operations.

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We combine the techniques of buffered reading of a file and command-line flag parsing in the following example. If there are no arguments, what is typed in is shown again in the output. Arguments are treated as filenames, and when the files exist, their content is shown. Test it out with:

cat test.txt

1.Origin, Context and Popularity of GO

2.Basic Constructs and Elementary Data Types

3.Control Structures

4.Functions

5.Arrays and Slices

6.Maps

7.Packages

8.Structs and Methods

9.Interfaces and Reflection

10.Reading and Writing

11.Error-Handling and Testing

12.Goroutines and Channels

13.Networking, Templating and Web-Applications

14.Common Go Pitfalls and Patterns

15.Performance Advices

16.Building a Complete Application

17.Appendix

Reading Files with a Buffer