v1.16.12

Added:
* slicesx:
** Last
** LastIndex

slicesx/funcs.go

@@ -0,0 +1,43 @@
+package slicesx
+
+/*
+Last returns the last item/element in slice s.
+
+e will be the nil/zero value of the slice element type
+if the slice length is 0.
+*/
+func Last[S ~[]E, E any](s S) (e E) {
+
+	var idx int = LastIndex(s)
+
+	if idx < 0 {
+		return
+	}
+
+	e = s[idx]
+
+	return
+}
+
+/*
+LastIndex returns the index of the last element in slice s.
+
+If s is empty, idx will be -1.
+If s is nil, idx will be -2.
+*/
+func LastIndex[S ~[]E, E any](s S) (idx int) {
+
+	var l int = len(s)
+
+	idx = -2
+	if s != nil {
+		idx++
+	}
+	if l == 0 {
+		return
+	}
+
+	idx = l - 1
+
+	return
+}