l := list.New()
for i := 1; i <= 5; i++ {
  l.PushBack(i)
}
for e := l.Front(); e != nil; e = e.Next() {
  fmt.Print(e.Value)
  if e.Next() != nil {
    fmt.Print("->")
  }
}
// Output:
// 1->2->3->4->5

l := list.New()
GenerateN(ListBackInserter(l), 5, IotaGenerator(1))
Copy(lBegin(l), lEnd(l), IOWriter(os.Stdout, "->"))
// Output:
// 1->2->3->4->5

s := "!dlrow olleH"
var sb strings.Builder
for i := len(s) - 1; i >= 0; i-- {
  sb.WriteByte(s[i])
}
fmt.Println(sb.String())

b := []byte(s)
for i := len(s)/2 - 1; i >= 0; i-- {
  j := len(s) - 1 - i
  b[i], b[j] = b[j], b[i]
}
fmt.Println(string(b))
// Output:
// Hello world!
// Hello world!

s := "!dlrow olleH"
fmt.Println(MakeString(StringRBegin(s), StringREnd(s)))

b := []byte(s)
Reverse(begin(b), end(b))
fmt.Println(string(b))
// Output:
// Hello world!
// Hello world!

in := []int{3, 2, 1, 4, 3, 2, 1, 4, 1}
sort.Ints(in)
j := 0
for i := 1; i < len(in); i++ {
  if in[j] == in[i] {
    continue
  }
  j++
  in[j] = in[i]
}
in = in[:j+1]
fmt.Println(in)
// Output:
// [1 2 3 4]

in := []int{3, 2, 1, 4, 3, 2, 1, 4, 1}
Sort(begin(in), end(in))
Erase(&in, Unique(begin(in), end(in)))
fmt.Println(in)
// Output:
// [1 2 3 4]

ch := make(chan int)
go func() {
  for _, x := range rand.Perm(100) {
    ch <- x + 1
  }
  close(ch)
}()
var sum int
for x := range ch {
  sum += x
}
fmt.Println(sum)
// Output:
// 5050

ch := make(chan int)
go func() {
  CopyN(IotaReader(1), 100, ChanWriter(ch))
  close(ch)
}()
fmt.Println(Accumulate(ChanReader(ch), ChanEOF, 0))
// Output:
// 5050

str := "  a  quick   brown  fox  "
var sb strings.Builder
var prevIsSpace bool
for i := 0; i < len(str); i++ {
  if str[i] != ' ' || !prevIsSpace {
    sb.WriteByte(str[i])
  }
  prevIsSpace = str[i] == ' '
}
fmt.Println(sb.String())
// Output:
// a quick brown fox

str := "  a  quick   brown  fox  "
var sb StringBuilderInserter
UniqueCopyIf(sBegin(str), sEnd(str), &sb,
  func(x, y Any) bool { return x.(byte) == ' ' && y.(byte) == ' ' })
fmt.Println(sb.String())
// Output:
// a quick brown fox

// Need to manually mantain a min-heap.

top := make([]int, 5)
PartialSortCopyBy(ChanReader(ch), ChanEOF, begin(top), end(top),
  func(x, y Any) bool { return x.(int) > y.(int) })
Copy(begin(top), end(top), IOWriter(os.Stdout, ", "))

// Usually requires some sort of recursion

s := []string{"a", "b", "c"}
for ok := true; ok; ok = NextPermutation(begin(s), end(s)) {
  fmt.Println(s)
}
// Output:
// [a b c]
// [a c b]
// [b a c]
// [b c a]
// [c a b]
// [c b a]