Strings

Beginner · Fundamentals

A Go string is an immutable sequence of bytes, usually UTF-8. The strings package has the utilities; unicode/utf8 and []rune handle characters.

• strings1 — strings package helpers (ToLower, ReplaceAll)
• strings2 — bytes vs runes (len vs utf8.RuneCountInString)

Resources

• Go by Example: String Functions
• Go blog: Strings, bytes, runes and characters
• pkg.go.dev: strings · unicode/utf8

Exercises

strings1 test

The strings package holds the everyday string utilities.

Show hint

Chain two strings helpers:

return strings.ReplaceAll(strings.ToLower(s), " ", "-")

Source

strings2 test

A Go string is bytes, not characters. len(s) counts BYTES; one multibyte

Show hint

len counts bytes; count runes instead:

return utf8.RuneCountInString(s)

Source