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ABENJSON_OVIEW - JSON OVIEW

ABENJSON_OVIEW - JSON OVIEW

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- Quick Overview

generally represents a subset of the JavaScript syntax. JSON data is stored and transported as character strings in a character format.

The syntax of JSON consists of the following components:

  • Syntax characters
  • Curly brackets { } define objects.

  • Square brackets [ ] define arrays.

  • A colon : separates the name and the value of an object component.

  • A comma , separates the components inside arrays and objects.

  • Representation of values
  • Character-like values are specified between double quotation marks " ". The \ character is used as the escape character for syntax characters.

  • Boolean values are represented by the keywords true and false.

  • Null values are represented by the keyword null.

  • Data structures
  • An array is an ordered list of values, arrays, or objects enclosed in square brackets [ ] and separated by commas ,, which do not need to have the same type. An empty array, [ ], is also possible.

  • An object is an ordered list of components enclosed in curly brackets { } and separated by commas ,. A component is a name specified in double quotation marks followed by a colon : followed by a value, array, or object.. An empty object, { }, is also possible. Unique names for the components of an object are recommended, but not mandatory.

Empty space (blanks, line breaks) can be used anywhere before and after the syntax characters. At the top level, valid JSON data contains a single value, an array, or an object. Arrays and objects can contain further values, arrays, or objects.

Note

In JavaScript, JSON data can be transformed to JavaScript objects directly using a built-in function eval due to its compatibility. In other programming languages, JSON data is read using parsers, which is also recommended for JavaScript for reasons of performance and security.

Examples






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