Data commit

Task/Entropy/Go/entropy-1.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+    "fmt"
+    "math"
+    "strings"
+)
+
+func main(){
+    fmt.Println(H("1223334444"))
+}
+
+// for ASCII strings
+func H(data string) (entropy float64) {
+    if data == "" {
+        return 0
+    }
+    for i := 0; i < 256; i++ {
+        px := float64(strings.Count(data, string(byte(i)))) / float64(len(data))
+        if px > 0 {
+	    entropy += -px * math.Log2(px)
+	}
+    }
+    return entropy
+}

Task/Entropy/Go/entropy-2.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+    "fmt"
+    "math"
+)
+
+func main() {
+    const s = "1223334444"
+
+    l := float64(0)
+    m := map[rune]float64{}
+    for _, r := range s {
+        m[r]++
+        l++
+    }
+    var hm float64
+    for _, c := range m {
+        hm += c * math.Log2(c)
+    }
+    fmt.Println(math.Log2(l) - hm/l)
+}