Add readme example

examples/strings_processing/main.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"fmt"
+	"github.com/hovsep/fmesh"
+	"github.com/hovsep/fmesh/component"
+	"github.com/hovsep/fmesh/port"
+	"github.com/hovsep/fmesh/signal"
+	"os"
+	"strings"
+)
+
+// This example is used in readme.md
+func main() {
+	fm := fmesh.New("hello world").
+		WithComponents(
+			component.New("concat").
+				WithInputs("i1", "i2").
+				WithOutputs("res").
+				WithActivationFunc(func(inputs *port.Collection, outputs *port.Collection) error {
+					word1 := inputs.ByName("i1").FirstSignalPayloadOrDefault("").(string)
+					word2 := inputs.ByName("i2").FirstSignalPayloadOrDefault("").(string)
+
+					outputs.ByName("res").PutSignals(signal.New(word1 + word2))
+					return nil
+				}),
+			component.New("case").
+				WithInputs("i1").
+				WithOutputs("res").
+				WithActivationFunc(func(inputs *port.Collection, outputs *port.Collection) error {
+					inputString := inputs.ByName("i1").FirstSignalPayloadOrDefault("").(string)
+
+					outputs.ByName("res").PutSignals(signal.New(strings.ToTitle(inputString)))
+					return nil
+				})).
+		WithConfig(fmesh.Config{
+			ErrorHandlingStrategy: fmesh.StopOnFirstErrorOrPanic,
+			CyclesLimit:           10,
+		})
+
+	fm.Components().ByName("concat").Outputs().ByName("res").PipeTo(
+		fm.Components().ByName("case").Inputs().ByName("i1"),
+	)
+
+	// Init inputs
+	fm.Components().ByName("concat").InputByName("i1").PutSignals(signal.New("hello "))
+	fm.Components().ByName("concat").InputByName("i2").PutSignals(signal.New("world !"))
+
+	// Run the mesh
+	_, err := fm.Run()
+
+	// Check for errors
+	if err != nil {
+		fmt.Println("F-Mesh returned an error")
+		os.Exit(1)
+	}
+
+	//Extract results
+	results := fm.Components().ByName("case").OutputByName("res").FirstSignalPayloadOrNil()
+	fmt.Printf("Result is : %v", results)
+}