Techniques we will learn

• concatenate
• CLI pipeline - output to a file with >

Code we will use from the standard library

os.Create

This allows us to create a file.

func Create(name string) (*File, error)

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defer

The defer keyword allows us to defer the execution of a statement until the function in which we have placed the defer statement returns.

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io.Copy

This allows us to copy from from a source to a destination.

func Copy(dst Writer, src Reader) (written int64, err error)

strings.NewReader

NewReader returns a new Reader reading from s.

func NewReader(s string) *Reader

os.Args

Args is a variable from package os. Args hold the command-line arguments, starting with the program name.

var Args []string