Data commit

Task/Stem-and-leaf-plot/Go/stem-and-leaf-plot.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+    "fmt"
+    "sort"
+    "strconv"
+    "strings"
+)
+
+var data = `12 127 28 42` //...omitted...127 31 116 146`
+
+func main() {
+    // load data into map
+    m := make(map[int][]string)
+    for _, s := range strings.Fields(data) {
+        if len(s) == 1 {
+            m[0] = append(m[0], s)
+        } else if i, err := strconv.Atoi(s[:len(s)-1]); err == nil {
+            m[i] = append(m[i], s[len(s)-1:])
+        } else {
+            panic("non numeric data")
+        }
+    }
+    // sort stem
+    s := make([]int, len(m))
+    var i int
+    for k := range m {
+        s[i] = k
+        i++
+    }
+    sort.Ints(s)
+    // print
+    for k := s[0]; ; k++ {
+        v := m[k]
+        sort.Strings(v)
+        fmt.Printf("%2d | %s\n", k, strings.Join(v, " "))
+        if k == s[len(s)-1] {
+            break
+        }
+    }
+}