finished woo

about_common_interfaces.go

@@ -1,6 +1,7 @@
 package go_koans
 
 import "bytes"
+import "strings"
 
 func aboutCommonInterfaces() {
 	{
@@ -8,7 +9,6 @@ func aboutCommonInterfaces() {
 		in.WriteString("hello world")
 
 		out := new(bytes.Buffer)
-
 		/*
 		   Your code goes here.
 		   Hint, use these resources:
@@ -17,15 +17,16 @@ func aboutCommonInterfaces() {
 		   $ open http://localhost:8080/pkg/io/
 		   $ open http://localhost:8080/pkg/bytes/
 		*/
-
+		in.WriteTo(out)
 		assert(out.String() == "hello world") // get data from the io.Reader to the io.Writer
 	}
 
 	{
 		in := new(bytes.Buffer)
 		in.WriteString("hello world")
-
 		out := new(bytes.Buffer)
+		str := in.String()
+		out.WriteString(strings.Split(str, " ")[0])
 
 		assert(out.String() == "hello") // duplicate only a portion of the io.Reader
 	}