update book code

eBook/exercises/chapter_11/min_interface.go

@@ -0,0 +1,28 @@
+// min_interface.go
+package min
+
+type Miner interface {
+	Len() int
+	ElemIx(ix int) interface{}
+	Less(i, j int) bool
+}
+
+func Min(data Miner) interface{}  {
+	min := data.ElemIx(0)
+	for i:=1; i < data.Len(); i++ {
+		if data.Less(i, i-1) {
+				min = data.ElemIx(i)
+		}
+	}
+	return min
+}
+
+type IntArray []int
+func (p IntArray) Len() int           		  { return len(p) }
+func (p IntArray) ElemIx(ix int) interface{}  { return p[ix] }
+func (p IntArray) Less(i, j int) bool 		  { return p[i] < p[j] }
+
+type StringArray []string
+func (p StringArray) Len() int              	 { return len(p) }
+func (p StringArray) ElemIx(ix int) interface{}  { return p[ix] }
+func (p StringArray) Less(i, j int) bool    	 { return p[i] < p[j] }