Исходники и презентации

lessons/functions/composition/main.go

@@ -0,0 +1,26 @@
+package main
+
+import "fmt"
+
+func sqr(number int) int {
+	return number * number
+}
+
+func neg(number int) int {
+	return -number
+}
+
+func compose(fn ...func(int) int) func(int) int {
+	return func(value int) int {
+		for _, v := range fn {
+			value = v(value)
+		}
+
+		return value
+	}
+}
+
+func main() {
+	fn := compose(sqr, neg, sqr)
+	fmt.Println(fn(4))
+}