types/views: remove duplicate SliceContainsFunc

We already have `(Slice[T]).ContainsFunc`.

Updates #cleanup

Signed-off-by: Maisem Ali <maisem@tailscale.com>

ipn/ipnlocal/local.go

@@ -3696,8 +3696,8 @@ func dnsConfigForNetmap(nm *netmap.NetworkMap, peers map[tailcfg.NodeID]tailcfg.
 	}
 
 	// selfV6Only is whether we only have IPv6 addresses ourselves.
-	selfV6Only := views.SliceContainsFunc(nm.GetAddresses(), tsaddr.PrefixIs6) &&
-		!views.SliceContainsFunc(nm.GetAddresses(), tsaddr.PrefixIs4)
+	selfV6Only := nm.GetAddresses().ContainsFunc(tsaddr.PrefixIs6) &&
+		!nm.GetAddresses().ContainsFunc(tsaddr.PrefixIs4)
 	dcfg.OnlyIPv6 = selfV6Only
 
 	// Populate MagicDNS records. We do this unconditionally so that

net/tsaddr/tsaddr.go

@@ -181,7 +181,7 @@ func NewContainsIPFunc(addrs views.Slice[netip.Prefix]) func(ip netip.Addr) bool
 	// If any addr is more than a single IP, then just do the slow
 	// linear thing until
 	// https://github.com/inetaf/netaddr/issues/139 is done.
-	if views.SliceContainsFunc(addrs, func(p netip.Prefix) bool { return !p.IsSingleIP() }) {
+	if addrs.ContainsFunc(func(p netip.Prefix) bool { return !p.IsSingleIP() }) {
 		acopy := addrs.AsSlice()
 		return func(ip netip.Addr) bool {
 			for _, a := range acopy {

types/views/views.go

@@ -274,12 +274,7 @@ func (v Slice[T]) IndexFunc(f func(T) bool) int {
 //
 // As it runs in O(n) time, use with care.
 func (v Slice[T]) ContainsFunc(f func(T) bool) bool {
-	for _, x := range v.ж {
-		if f(x) {
-			return true
-		}
-	}
-	return false
+	return slices.ContainsFunc(v.ж, f)
 }
 
 // SliceContains reports whether v contains element e.
@@ -289,11 +284,6 @@ func SliceContains[T comparable](v Slice[T], e T) bool {
 	return slices.Contains(v.ж, e)
 }
 
-// SliceContainsFunc reports whether f reports true for any element in v.
-func SliceContainsFunc[T any](v Slice[T], f func(T) bool) bool {
-	return slices.ContainsFunc(v.ж, f)
-}
-
 // SliceEqual is like the standard library's slices.Equal, but for two views.
 func SliceEqual[T comparable](a, b Slice[T]) bool {
 	return slices.Equal(a.ж, b.ж)

types/views/views_test.go

@@ -124,8 +124,6 @@ func TestViewUtils(t *testing.T) {
 	c.Check(v.IndexFunc(func(s string) bool { return strings.HasPrefix(s, "z") }), qt.Equals, -1)
 	c.Check(SliceContains(v, "bar"), qt.Equals, true)
 	c.Check(SliceContains(v, "baz"), qt.Equals, false)
-	c.Check(SliceContainsFunc(v, func(s string) bool { return strings.HasPrefix(s, "f") }), qt.Equals, true)
-	c.Check(SliceContainsFunc(v, func(s string) bool { return len(s) > 3 }), qt.Equals, false)
 	c.Check(SliceEqualAnyOrder(v, v), qt.Equals, true)
 	c.Check(SliceEqualAnyOrder(v, SliceOf([]string{"bar", "foo"})), qt.Equals, true)
 	c.Check(SliceEqualAnyOrder(v, SliceOf([]string{"foo"})), qt.Equals, false)