lean into examples

examples/json/json.go

@@ -0,0 +1,39 @@
+package main
+
+import "encoding/json"
+import "fmt"
+
+func main() {
+    // data to bytes/string
+    bolB, _ := json.Marshal(true)
+    fmt.Println(string(bolB))
+
+    numB, _ := json.Marshal(1)
+    fmt.Println(string(numB))
+
+    strB, _ := json.Marshal("gopher")
+    fmt.Println(string(strB))
+
+    arrD := []string{"apple", "peach", "pear"}
+    arrB, _ := json.Marshal(arrD)
+    fmt.Println(string(arrB))
+
+    hshD := map[string]int{"apple": 5, "lettuce": 7}
+    hshB, _ := json.Marshal(hshD)
+    fmt.Println(string(hshB))
+
+    // string to data
+    byt := []byte(`{"num":6.0,"strs":["a","b"]}`)
+    var dat map[string]interface{}
+    err := json.Unmarshal(byt, &dat)
+    if err != nil {
+        panic(err)
+    }
+    fmt.Println(dat)
+
+    num := dat["num"].(float64)
+    fmt.Println(num)
+
+    strs := dat["strs"].([]interface{})
+    fmt.Println(strs)
+}