Join David Gassner for an in-depth discussion in this video Reading from a text file, part of Learning Go.
- You can easily read the contents of a file…using a function from the ioutil package…named readFile.…In this folder, I have two files.…A go source file named readFile.go,…and a text file that has a simple string.…I've already imported the ioutil package,…and in the main function…I've declared a string variable…that points to my file in the current directory.…Now, I'll simply call the function.…It's going to return content in the form…of a byte array.…
I'll name this content,…and it also will return an error object.…Then I'll call the function with ioutil,…and then ReadFile.…Notice the capitalization.…Make sure you spell it exactly like that.…Then, pass in the filename.…If everything works correctly,…it should return a byte array.…But just to be sure,…code the checkError function…and pass in the error object.…If you get past that call,…you should have content to work with.…
So now I'll call fmt.Println…and I'll start with a label of Read from file,…and then I'll pass in the content.…And I'll run that version of the code.…
- Installing Go tools
- Creating and compiling a Go workspace
- Exploring variables, constants, and types
- Storing ordered and unordered values
- Grouping related values in structs
- Programming conditional logic and loops
- Defining and calling functions
- Handling errors
- Working with files
- Creating a simple HTTP server
Skill Level Beginner
1. Getting Started
2. Essential Go Skills
3. Managing Simple Values
4. Managing Complex Types and Collections
5. Managing Program Flow
6. Structuring Go Code
7. Working with Files and the Web
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