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Just an introduction

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json.md

@@ -14,19 +14,19 @@ JSON (JavaScript Object Notation) is a __text-based data exchange format__.
14 14 It is a collection of key-value pairs where the key must be a string type, and
15 15 the value can be of any of the following types:
16 16
17 - - Number
18 - - String
19 - - Boolean
20 - - Array
21 - - Object
22 - - null
17 + - Number `{“age”: 45}`
18 + - String `{"school": "ZipCode"}`
19 + - Boolean `{“active”:true}`
20 + - Array `{ "nums": [ 13, 17, 19, 23 ] }`
21 + - Object `{ "spouse":{"firstName":"John","lastName":"Smith" } }`
22 + - null `{"weddingDate": null}`
23 23
24 24 A couple of important rules to note:
25 25
26 - - In the JSON data format, the keys must be enclosed in double quotes.
26 + - In the JSON data format, the keys must be enclosed in double quotes as strings.
27 27 - The key and value must be separated by a colon (:) symbol.
28 28 - There can be multiple key-value pairs. Two key-value pairs must be separated by a comma (,) symbol.
29 - - No comments (// or /* */) are allowed in JSON data. (But you can get around that, if you're curious.)
29 + - No comments (// or /* */) are allowed in JSON data.
30 30
31 31 ## Usage
32 32

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json.md

@@ -4,13 +4,15 @@ JavaScript Object Notation (JSON) is a standard text-based format for representi
4 4 based on JavaScript object syntax.
5 5 It is commonly used for transmitting data in web applications (e.g., sending some data
6 6 from the server to the client, so it can be displayed on a web page, or vice versa).
7 - You'll come across it quite often, so in this article, we give you all you need to
8 - work with JSON using JavaScript, including parsing JSON so you can access data within it, and creating JSON.
7 + You'll come across it quite often.
8 + Better get a handle on it.
9 +
9 10
10 11 ## Data Types
11 12
12 13 JSON (JavaScript Object Notation) is a __text-based data exchange format__.
13 - It is a collection of key-value pairs where the key must be a string type, and the value can be of any of the following types:
14 + It is a collection of key-value pairs where the key must be a string type, and
15 + the value can be of any of the following types:
14 16
15 17 - Number
16 18 - String
@@ -29,7 +31,8 @@ A couple of important rules to note:
29 31 ## Usage
30 32
31 33 Often, you may read or write it to files, for configuration purposes, small data sets, and useful structured data.
32 - It is a common, go-to data format. Most languages have great support for reading and writing it, like Java and Python.
34 + It is a common, go-to data format. Most languages have great support for reading and writing it,
35 + like Java and Python.
33 36
34 37 JSON exists as a string — useful when you want to transmit data across a network.
35 38 It needs to be converted to a native object when you want to access the data within a program.

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1 file changed, 3 insertions, 3 deletions

json.md

@@ -97,7 +97,7 @@ It has a great set of syntax flow diagrams you can use to under stand it.
97 97
98 98 ## JSON Examples
99 99
100 - Maybe something that came from a bloggin system.
100 + Maybe something that came from a bloggin' system.
101 101
102 102 ```json
103 103 {
@@ -112,7 +112,7 @@ Maybe something that came from a bloggin system.
112 112 }
113 113 ```
114 114
115 - Or this one, a example of something whihc might have come from a database:
115 + Or this one, a example of something which might have come from a database:
116 116
117 117 ```json
118 118 {
@@ -129,7 +129,7 @@ Or this one, a example of something whihc might have come from a database:
129 129 }
130 130 ```
131 131
132 - An array:
132 + An array of employees:
133 133
134 134 ```json
135 135 {

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1 file changed, 19 insertions, 13 deletions

json.md

@@ -34,7 +34,19 @@ It is a common, go-to data format. Most languages have great support for reading
34 34 JSON exists as a string — useful when you want to transmit data across a network.
35 35 It needs to be converted to a native object when you want to access the data within a program.
36 36
37 - Example of [python reading of file containing JSON.
37 +
38 + A simple object
39 +
40 + ```json
41 + {
42 + "fruit": "Apple",
43 + "size": "Large",
44 + "color": "Red",
45 + "nums": [ 13, 17, 19, 23 ]
46 + }
47 + ```
48 +
49 + Example of python reading of file containing JSON.
38 50
39 51 ```python
40 52 # Python program to read
@@ -48,9 +60,12 @@ f = open('data.json')
48 60 # returns JSON object as a dictionary
49 61 data = json.load(f)
50 62
63 + print(data['fruit']) # 'Apple'
64 +
65 +
51 66 # Iterating through the json list
52 - for i in data['some-array-key']: # in data
53 - print(i)
67 + for i in data['nums']: # in data
68 + print(i) # 13, ...
54 69
55 70 # Closing file
56 71 f.close()
@@ -75,22 +90,13 @@ import json
75 90 with open('data.json', 'w', encoding='utf-8') as f:
76 91 json.dump(data, f, ensure_ascii=False, indent=4)
77 92 ```
93 + Which will ofrmat the JSON for human reading.
78 94
79 95 Check out: [JSON (JavaScript Object Notation)](https://www.json.org/json-en.html)
80 96 It has a great set of syntax flow diagrams you can use to under stand it.
81 97
82 98 ## JSON Examples
83 99
84 - A simple object
85 -
86 - ```json
87 - {
88 - "fruit": "Apple",
89 - "size": "Large",
90 - "color": "Red"
91 - }
92 - ```
93 -
94 100 Maybe something that came from a bloggin system.
95 101
96 102 ```json

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1 file changed, 4 insertions, 6 deletions

json.md

@@ -36,7 +36,7 @@ It needs to be converted to a native object when you want to access the data wit
36 36
37 37 Example of [python reading of file containing JSON.
38 38
39 - ```json
39 + ```python
40 40 # Python program to read
41 41 # json file
42 42
@@ -45,13 +45,11 @@ import json
45 45 # Opening JSON file
46 46 f = open('data.json')
47 47
48 - # returns JSON object as
49 - # a dictionary
48 + # returns JSON object as a dictionary
50 49 data = json.load(f)
51 50
52 - # Iterating through the json
53 - # list
54 - for i in data['emp_details']:
51 + # Iterating through the json list
52 + for i in data['some-array-key']: # in data
55 53 print(i)
56 54
57 55 # Closing file

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1 file changed, 149 insertions

json.md

@@ -1,5 +1,154 @@
1 1 # JSON Fundamentals
2 2
3 + JavaScript Object Notation (JSON) is a standard text-based format for representing structured data
4 + based on JavaScript object syntax.
5 + It is commonly used for transmitting data in web applications (e.g., sending some data
6 + from the server to the client, so it can be displayed on a web page, or vice versa).
7 + You'll come across it quite often, so in this article, we give you all you need to
8 + work with JSON using JavaScript, including parsing JSON so you can access data within it, and creating JSON.
9 +
10 + ## Data Types
11 +
12 + JSON (JavaScript Object Notation) is a __text-based data exchange format__.
13 + It is a collection of key-value pairs where the key must be a string type, and the value can be of any of the following types:
14 +
15 + - Number
16 + - String
17 + - Boolean
18 + - Array
19 + - Object
20 + - null
21 +
22 + A couple of important rules to note:
23 +
24 + - In the JSON data format, the keys must be enclosed in double quotes.
25 + - The key and value must be separated by a colon (:) symbol.
26 + - There can be multiple key-value pairs. Two key-value pairs must be separated by a comma (,) symbol.
27 + - No comments (// or /* */) are allowed in JSON data. (But you can get around that, if you're curious.)
28 +
29 + ## Usage
30 +
31 + Often, you may read or write it to files, for configuration purposes, small data sets, and useful structured data.
32 + It is a common, go-to data format. Most languages have great support for reading and writing it, like Java and Python.
33 +
34 + JSON exists as a string — useful when you want to transmit data across a network.
35 + It needs to be converted to a native object when you want to access the data within a program.
36 +
37 + Example of [python reading of file containing JSON.
38 +
39 + ```json
40 + # Python program to read
41 + # json file
42 +
43 + import json
44 +
45 + # Opening JSON file
46 + f = open('data.json')
47 +
48 + # returns JSON object as
49 + # a dictionary
50 + data = json.load(f)
51 +
52 + # Iterating through the json
53 + # list
54 + for i in data['emp_details']:
55 + print(i)
56 +
57 + # Closing file
58 + f.close()
59 + ```
60 +
61 + Writing JSON:
62 +
63 + `data` is a Python dictionary. It needs to be encoded as JSON before writing.
64 +
65 + Use this for maximum compatibility (Python3 & 2, if you must):
66 +
67 + ```python
68 + import json
69 + with open('data.json', 'w') as f:
70 + json.dump(data, f)
71 + ```
72 +
73 + On a modern system (i.e. Python 3 and UTF-8 support), you can write a nicer file using:
74 +
75 + ```python
76 + import json
77 + with open('data.json', 'w', encoding='utf-8') as f:
78 + json.dump(data, f, ensure_ascii=False, indent=4)
79 + ```
80 +
3 81 Check out: [JSON (JavaScript Object Notation)](https://www.json.org/json-en.html)
4 82 It has a great set of syntax flow diagrams you can use to under stand it.
5 83
84 + ## JSON Examples
85 +
86 + A simple object
87 +
88 + ```json
89 + {
90 + "fruit": "Apple",
91 + "size": "Large",
92 + "color": "Red"
93 + }
94 + ```
95 +
96 + Maybe something that came from a bloggin system.
97 +
98 + ```json
99 + {
100 + "title": "New Blog Post",
101 + "content": "This is the content of the blog post...",
102 + "publishedDate": "2023-08-25T15:00:00Z",
103 + "author": {
104 + "username": "authoruser",
105 + "email": "author@example.com"
106 + },
107 + "tags": ["Technology", "Programming"]
108 + }
109 + ```
110 +
111 + Or this one, a example of something whihc might have come from a database:
112 +
113 + ```json
114 + {
115 + "patientName": "Jane Doe",
116 + "dateOfBirth": "1985-02-15",
117 + "bloodType": "A+",
118 + "allergies": ["Pollen", "Penicillin"],
119 + "conditions": ["Hypertension", "Diabetes"],
120 + "medications": ["Lisinopril", "Metformin"],
121 + "emergencyContact": {
122 + "username": "emergencyuser",
123 + "email": "johnDoe@gmale.com"
124 + }
125 + }
126 + ```
127 +
128 + An array:
129 +
130 + ```json
131 + {
132 + "employees":[
133 + {"firstName":"John", "lastName":"Doe"},
134 + {"firstName":"Anna", "lastName":"Smith"},
135 + {"firstName":"Peter", "lastName":"Jones"}
136 + ]
137 + }
138 + ```
139 +
140 +
141 +
142 +
143 +
144 +
145 +
146 +
147 +
148 +
149 +
150 +
151 +
152 +
153 +
154 +

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1 file changed, 5 insertions

json.md(Datei erstellt)

@@ -0,0 +1,5 @@
1 + # JSON Fundamentals
2 +
3 + Check out: [JSON (JavaScript Object Notation)](https://www.json.org/json-en.html)
4 + It has a great set of syntax flow diagrams you can use to under stand it.
5 +
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