JSON Concepts: Difference between revisions
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Never use single quotes ('), always use double quotes ("). | Never use single quotes ('), always use double quotes ("). | ||
=JSON Schema= | |||
JSON Schema is a vocabulary that allows to annotate and validate JSON documents. The schema describes the data format, and provides complete structural validation. More http://json-schema.org. | |||
Revision as of 16:26, 25 February 2017
Internal
Data Types
JSON data types are: null, Booleans, Strings, Numbers, Objects (which can be thought of as Maps) and Arrays.
null
Booleans
Booleans are represented as
true false
and they are not quoted.
Strings
Strings are represented as:
"this is a string"
and they are quoted. Always use double quotes ("), never use single quotes (').
Numbers
Numbers are represented as:
10
and they are not quoted.
Objects
Objects are enclosed in curly brackets "{}" and contain key/value pairs. The key and the value are separated by colon (":"). The pairs are delimited by commas (","):
{
"id" : 42,
"name" : "John Doe",
"married" : true
"kids" : [ "Alice", "Bob" ]
}
Arrays
Array elements are enclosed in brackets "[", and they are separated by commas:
[ "one element", "another element" ]
Comments
JSON does not support comments: https://plus.google.com/+DouglasCrockfordEsq/posts/RK8qyGVaGSr
A comment can be simulated as follows:
{
"comment":"this is a comment",
...
}
Single Quotes vs. Double Quotes
Never use single quotes ('), always use double quotes (").
JSON Schema
JSON Schema is a vocabulary that allows to annotate and validate JSON documents. The schema describes the data format, and provides complete structural validation. More http://json-schema.org.