Intro to JSON
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This document provides an introduction to JSON (JavaScript Object Notation). It defines JSON as a text format for storing and transporting data that is easy for humans to read and for machines to parse. The document explains that JSON can represent arbitrary data, can be processed by most programming languages, and is useful for transferring data between computers which may interpret data differently. It provides an example of a JSON string and compares JSON to XML, noting advantages of JSON such as brevity and ease of parsing. The document outlines valid JSON data types and provides examples of JSON variables.
![JSON Variable examples
a string - {"name":"John"}
a number - {"age":30}
an object (JSON object) – {"employee":{"name":"John", "age":30, "city":"New
York"}}
an array - {"employees":["John", "Anna", "Peter"]}
a Boolean - {"sale":true}
Null - {"middlename":null}](https://image.slidesharecdn.com/4androidjsonparse-220311064813/85/Intro-to-JSON-10-320.jpg)
Intro to JSON
- 1. JSON Introduction Android JSON Mark Daniel G. Dacer
- 2. JSON JSON stands for JavaScript Object Notation JSON is a text format for storing and transporting data JSON is "self-describing" and easy to understand JSON is representing arbitrary data in ASCII format Can be easily transfer through the internet Can be store in disk Can be process by most of programming language
- 3. Computer and Data Computer are great at storing and processing data But the data format representation is different across The program that has written it The architecture of the machine using it There’s a good chance that the data is interpreted in different ways Can cause corrupt data, errors and incorrect data. JSON gives you a way to represent data structure that is free from the program, it represent. XML does something similar
- 4. JSON Example This example is a JSON string: '{"name":"John", "age":30, "car":null}‘ It defines an object with 3 properties: name age car Each property has a value.
- 5. JSON vs XML JSON vs XML
- 6. JSON is like xml because Both JSON and XML are "self describing" (human readable) Both JSON and XML can be parsed and used by lots of programming languages Both JSON and XML can be fetched with an XMLHttpRequest
- 7. JSON is Unlike XML Because JSON doesn't use end tag JSON is shorter JSON is quicker to read and write JSON can use arrays
- 8. Why JSON is Better Than XML XML is much more difficult to parse than JSON. JSON is parsed into a ready-to-use JavaScript object. Its lightweight in some ways Has same parser as the JavaScript
- 9. JSON Valid Data Types In JSON, values must be one of the following data types: a string a number an object (JSON object) an array a boolean null • JSON values cannot be one of the following data types: • a function • a date • undefined
- 10. JSON Variable examples a string - {"name":"John"} a number - {"age":30} an object (JSON object) – {"employee":{"name":"John", "age":30, "city":"New York"}} an array - {"employees":["John", "Anna", "Peter"]} a Boolean - {"sale":true} Null - {"middlename":null}
- 11. Validate and parse your JSON online Load JSON url or file on this Web App: https://codebeautify.org/jsonviewer
- 12. More learning links JSON, not Jason - https://www.youtube.com/watch?v=A0hoqSkyY7o Official JSON website - https://www.json.org/json-en.html Android JSON parser: https://www.tutorialspoint.com/android/android_json_parser.htm