JSON depth and Org.json library

• Understanding JSON (Javascript Object Notation)

Website: http://json.org/

中文版 JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It's easy for machines to parse and generate. It is based on a subset of the JavaScript programming Language, Standard ECMA-262 3rd edition-december 1999. JSON is a text format, which is completely language independent but uses conventions that's familiar to programmers of the C-family of languages, including C, C + +, C #, Java, JavaScript, Perl, Python, and many others. These properties make JSON an ideal Data-interchange language. JSON is built on structures: A collection of name/value pairs. In various languages, the is realized as an object, record, struct, dictionary, hash table, keyed list, or assoc Iative Array. An ordered list of values. In the most languages, the realized as an array, vector, list, or sequence. These is universal data structures. Virtually all modern programming languages support them in one form or another. It makes sense, that a data format, is interchangeable with programming languages also being based on these structures. In JSON, they take on these forms: An object was an unordered set of name/value pairs. An object begins with { (left brace) and ends with } (right brace). Each name was followed by : (colon) and the Name/value pairs was separated by, (comma) . An array was an ordered collection of values. An array of begins with [ (left bracket) and ends with ] (right bracket). Values is separated by, (comma). A value can be a string in double quotes, or a number, or true or false O R Null, or an object or an array. These structures can be nested. A string is a sequence of zero or more Unicode characters, wrapped in double quotes, using backslash escapes. A character is represented as a and a single character string. A string is very much like a C or Java string. A number is very much like a C or Java number, except that the octal and hexadecimal formats was not used. Whitespace can inserted between any pair of tokens. Excepting a few encoding details, that completely describes the language.

Chinese translation JSON (JavaScript object graph) is a lightweight, number-switched format. It is easy for human to read and write. Easy for machine parsing and generation. It is based on a subset of JavaScript language, Standard ECMA-262 third edition. JSON is a language-independent text format, but it is traditionally used in our familiar C language programming languages, such as C,c++,c#,java,javascript,perl,python, and other languages. These features make JSON an ideal language for data interchange formats. JSON is built on two formats: 1 based on a set of name/value pairs, implemented in various languages as an object, record, struct, pointing, hash table, a key list, or an associative array. PS: Can be understood as a map in Java A list of 21 ordered values. In most languages, the implementation becomes an array, a vector, a list, or a sequence. These are some of the most common data structures. In fact, all modern programming languages support this programming structure in one form or another. The implication is that it can be exchanged between programming languages based on such a structure. In JSON, the following structure is used: An object that is an unnecessary name/value pair. An object with curly braces {start with} as the end flag. Each name is immediately followed by a colon, and a comma is used to divide the name value pairs. An array is an ordered collection of values. An array ends with a square bracket [starting with the closing bracket]. Use commas between the values to split them. A value that can be quoted by using double quotation marks, or a number, or a Boolean value of True/false, or null, or an object, or an array of arrays. And these structures can be nested. A string, consisting of 0 or more Unicode characters, wrapped in double quotation marks and escaped with a backslash \. A character is represented as a string of length 1 (because there is no concept of a character in JavaScript, only a string), and a string is the same as the C or Java language string type. The numbers are very similar to the number types in C or the Java language, except that the octal and hexadecimal formats are not used here. The extra spaces in the JSON format can be correctly understood by various languages. Like what: var s={' A ': ' 123 ', ' B ': false}; var s={' A ': ' 123 ', ' B ': false};//a few more spaces, which is also legal.

An object defined in JavaScript is one of the simplest JSON formats

Such as:

var s={' A ': ' 123 ', ' B ': false, ' C ': Undefined, ' d ': 123, ' E ': null};

var arr=[' A ', ' B ', ' C ', ' d ', false];

JSON depth and Org.json library