20201212

20201212/main.go

@@ -0,0 +1,17 @@
+package main
+
+func main() {
+
+}
+
+func compress(src []int) []int {
+	var ret []int
+	for i := 0; 2*i+1 < len(src); i++ {
+		freq := src[2*i]
+		val := src[2*i+1]
+		for j := 0; j < freq; j++ {
+			ret = append(ret, val)
+		}
+	}
+	return ret
+}

20201212/main_test.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"reflect"
+	"testing"
+)
+
+func Test_compress(t *testing.T) {
+	type args struct {
+		src []int
+	}
+	tests := []struct {
+		name string
+		args args
+		want []int
+	}{
+		{
+			"test1",
+			args{
+				[]int{1, 2, 3, 4},
+			},
+			[]int{2, 4, 4, 4},
+		},
+		{
+			"test2",
+			args{
+				[]int{1, 1, 2, 3},
+			},
+			[]int{1, 3, 3},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := compress(tt.args.src); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("compress() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}