1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
package jsonpath
import (
"bytes"
"fmt"
"io"
)
func ExampleDecoder_SeekTo() {
var j = []byte(`[
{"Space": "YCbCr", "Point": {"Y": 255, "Cb": 0, "Cr": -10}},
{"Space": "RGB", "Point": {"R": 98, "G": 218, "B": 255}}
]`)
w := NewDecoder(bytes.NewReader(j))
var v interface{}
w.SeekTo(0, "Space")
w.Decode(&v)
fmt.Println(0, "Space", v)
w.SeekTo(0, "Point", "Cr")
w.Decode(&v)
fmt.Println(0, "Point", "Cr", v)
w.SeekTo(1, "Point", "G")
w.Decode(&v)
fmt.Println(1, "Point", "G", v)
// Output:
// 0 Space YCbCr
// 0 Point Cr -10
// 1 Point G 218
}
func ExampleDecoder_Scan() {
var j = []byte(`{"colors":[
{"Space": "YCbCr", "Point": {"Y": 255, "Cb": 0, "Cr": -10, "A": 58}},
{"Space": "RGB", "Point": {"R": 98, "G": 218, "B": 255, "A": 231}}
]}`)
var actions PathActions
// Extract the value at Point.A
actions.Add(func(d *Decoder) error {
var alpha int
err := d.Decode(&alpha)
fmt.Printf("Alpha: %v\n", alpha)
return err
}, "Point", "A")
w := NewDecoder(bytes.NewReader(j))
w.SeekTo("colors", 0)
var ok = true
var err error
for ok {
ok, err = w.Scan(&actions)
if err != nil && err != io.EOF {
panic(err)
}
}
// Output:
// Alpha: 58
// Alpha: 231
}
func ExampleDecoder_Scan_anyIndex() {
var j = []byte(`{"colors":[
{"Space": "YCbCr", "Point": {"Y": 255, "Cb": 0, "Cr": -10, "A": 58}},
{"Space": "RGB", "Point": {"R": 98, "G": 218, "B": 255, "A": 231}}
]}`)
var actions PathActions
// Extract the value at Point.A
actions.Add(func(d *Decoder) error {
var cr int
err := d.Decode(&cr)
fmt.Printf("Chrominance (Cr): %v\n", cr)
return err
}, "colors", AnyIndex, "Point", "Cr")
actions.Add(func(d *Decoder) error {
var r int
err := d.Decode(&r)
fmt.Printf("Red: %v\n", r)
return err
}, "colors", AnyIndex, "Point", "R")
w := NewDecoder(bytes.NewReader(j))
var ok = true
var err error
for ok {
ok, err = w.Scan(&actions)
if err != nil && err != io.EOF {
panic(err)
}
}
// Output:
// Chrominance (Cr): -10
// Red: 98
}
|
