github.com/shogo82148/std@v1.22.1-0.20240327122250-4e474527810c/encoding/json/example_text_marshaling_test.go (about)

     1  // Copyright 2018 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package json_test
     6  
     7  import (
     8  	"github.com/shogo82148/std/encoding/json"
     9  	"github.com/shogo82148/std/fmt"
    10  	"github.com/shogo82148/std/log"
    11  )
    12  
    13  const (
    14  	Unrecognized Size = iota
    15  	Small
    16  	Large
    17  )
    18  
    19  func Example_textMarshalJSON() {
    20  	blob := `["small","regular","large","unrecognized","small","normal","small","large"]`
    21  	var inventory []Size
    22  	if err := json.Unmarshal([]byte(blob), &inventory); err != nil {
    23  		log.Fatal(err)
    24  	}
    25  
    26  	counts := make(map[Size]int)
    27  	for _, size := range inventory {
    28  		counts[size] += 1
    29  	}
    30  
    31  	fmt.Printf("Inventory Counts:\n* Small:        %d\n* Large:        %d\n* Unrecognized: %d\n",
    32  		counts[Small], counts[Large], counts[Unrecognized])
    33  
    34  	// Output:
    35  	// Inventory Counts:
    36  	// * Small:        3
    37  	// * Large:        2
    38  	// * Unrecognized: 3
    39  }