JSON(JavaScript Object Notation)



It was said that there are only three basic data structure primitives: mappings (hashes/dictionaries), sequences (arrays/lists) and scalars (strings/numbers). The scalar represents strings, integers, dates, and other atomic data types.

JSON defines all the data structures:
1. Sequences (arrays/lists) and Scalars (strings/numbers), separated by, (comma).
2. Mappings (hashes/dictionaries) are the name/value pairs, uses the format name : (colon) value.
3. Set of name/value pairs, set enclosed by a pair of curly braces{}, then begins with { (left brace) and ends with } (right brace).
4. Set of Sequences (arrays/lists) and Scalars (strings/numbers), set begins with [ (left bracket) and ends with ] (right bracket). For Example: An array is an ordered collection of values. An array begins with [ (left bracket) and ends with ] (right bracket).
* JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate.  Douglas Crockford designed JSON.



21世纪初，Douglas Crockford寻找一种简便的数据交换格式，能够在服务器之间交换数据。当时通用的数据交换语言是XML，但是Douglas Crockford觉得XML的生成和解析都太麻烦，所以他提出了一种简化格式，也就是Json。 
1） 并列的数据之间用逗号（"，"）分隔。
2） 映射用冒号（"："）表示。
3） 并列数据的集合（数组）用方括号("[]")表示。
4） 映射的集合（对象）用大括号（"{}"）表示。
上面四条规则，就是Json格式的所有内容。
(cite: www.ruanyifeng.com/blog/2009/05/data_types_and_json.html
, yaml.org/spec/1.2/spec.html ,www.json.org/)

评论

发表评论

此博客中的热门博文

XML, XSL, HTML

The code in this section is that an XSLT transform is used to translate XML input data to HTML output. Ref: https://docs.oracle.com/javase/tutorial/jaxp/xslt/transformingXML.html Note - The article1a.xsl , which is from in XSLT examples . The following code is for joy.  import java.awt.Desktop; import java.io.*; import java.net.URISyntaxException; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerConfigurationException; import javax.xml.transform.TransformerException; import javax.xml.transform.TransformerFactory; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import javax.xml.transform.stream.StreamSource; // For write operation import org.w3c.dom.Document; import org.w3c.dom.Element; import org.xml.sax.SAXException; public class Stylizer { ...
阅读全文

Input in element.eleme.io

Input Input data using mouse or keyboard. Input is a controlled component, it always shows Vue binding value . Under normal circumstances, input event should be handled. Its handler should update component's binding value (or use v-model ). Otherwise, input box's value will not change. Do not support v-model modifiers. ¶ Basic usage < el-input placeholder = "Please input" v-model = "input" > </ el-input > < script > export default { data() { return { input : '' } } } </ script > Hide ¶ Disabled Disable the Input with the disabled attribute. < el-input placeholder = "Please input" v-model = "input" :disabled = "true" > </ el-input > < script > export default { data() { return { input : '' } } } </ script > ¶ Clearable Make the Input clearable with the...
阅读全文

Data URI是由RFC 2397 ACE

https://www.rfc-editor.org/rfc/rfc2397 http://codingpy.com/article/how-to-turn-your-browser-into-code-editor/ https://ace.c9.io/build/kitchen-sink.html https://c9.io/ https://angular-ui.github.io/ The "data" URL scheme Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (1998). All Rights Reserved. 1 . Abstract A new URL scheme, "data", is defined. It allows inclusion of small data items as "immediate" data, as if it had been included externally. 2 . Description Some applications that use URLs also have a need to embed (small...
阅读全文