strings

• Documentation - https://pkg.go.dev/strings
• strings Package - The strings package provides many utility functions for string manipulation.

import "strings"

• Commonly used functions.

  Function	Description	Example	Result
  strings.ToLower()	Converts all characters to lowercase	strings.ToLower(“HELLO”)	“hello”
  strings.ToUpper()	Converts all characters to uppercase	strings.ToUpper(“hello”)	“HELLO”
  strings.Compare()	Lexicographically compares two strings	strings.Compare(“abc”,“abc”)	0
  strings.Contains()	Checks if substring exists	strings.Contains(“hello world”,“world”)	true
  strings.ContainsAny()	Checks if any character from set exists	strings.ContainsAny(“team”,“ae”)	true
  strings.ContainsRune()	Checks if rune exists	strings.ContainsRune(“hello”,‘e’)	true
  strings.ContainsFunc()	Checks if any rune satisfies a condition	strings.ContainsFunc(“Hello”, unicode.IsUpper)	true
  strings.Count()	Counts occurrences of substring	strings.Count(“banana”,“a”)	3
  strings.HasPrefix()	Checks if string starts with prefix	strings.HasPrefix(“golang”,“go”)	true
  strings.HasSuffix()	Checks if string ends with suffix	strings.HasSuffix(“file.txt”,“.txt”)	true
  strings.Index()	Returns first occurrence index	strings.Index(“hello”,“l”)	2
  strings.LastIndex()	Returns last occurrence index	strings.LastIndex(“hello”,“l”)	3
  strings.Join()	Joins slice elements into a string	strings.Join([]string{“go”,“is”,“fun”},” ”)	“go is fun”
  strings.Split()	Splits string into slice	strings.Split(“a,b,c”,”,”)	[“a”,“b”,“c”]
  strings.Replace()	Replaces substring occurrences (limited count)	strings.Replace(“foo bar foo”,“foo”,“baz”,1)	“baz bar foo”
  strings.ReplaceAll()	Replaces all occurrences	strings.ReplaceAll(“foo bar foo”,“foo”,“baz”)	“baz bar baz”
  strings.Trim()	Removes specified characters from both ends	strings.Trim(“!!hello!!”,”!”)	“hello”
  strings.TrimSpace()	Removes leading and trailing spaces	strings.TrimSpace(” hello ”)	“hello”
  strings.Lines()	Returns iterator over lines	strings.Lines(“a\nb\nc”)	line iterator

• String Builder

var builder strings.Builder
builder.WriteString("Hello")
builder.WriteString(", ")
builder.WriteString("world!")
fmt.Println(builder.String()) // Output: Hello, world!