JSON Array: Difference between revisions
Jump to navigation
Jump to search
m (Typographical tweaks) |
No edit summary |
||
| Line 1: | Line 1: | ||
The JSON Array is a native JSON Data Type and supported by many MapTool macro functions as an input or output. | |||
An array is an '''ordered''' collection of values. An array begins with {{code|[}} (left bracket) and ends with {{code|]}} (right bracket). Values are separated by {{code|,}} (comma).< | |||
[http://www.json.org JSON.org] defines it like this: | |||
<blockquote>An array is an '''ordered''' collection of values. An array begins with {{code|[}} (left bracket) and ends with {{code|]}} (right bracket). Values are separated by a {{code|,}} (comma).</blockquote> | |||
An array may hold any of the supported JSON Data Types: Number, String, Object, Array, Boolean and Null. | |||
== Examples of JSON Arrays == | |||
An array of strings. Note that each name is quoted and the whole array has single quotes around it. | |||
<source lang="mtmacro"> | |||
[h: beatles = '["Paul", "John", "George", "Ringo"]'] | |||
</source> | |||
An array of prime numbers. The numbers should not be quoted but the whole array has quotes around it. | |||
<source lang="mtmacro"> | |||
[h: primes = "[2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31]"] | |||
</source> | |||
A better way to initialize an array as you'll be less likely to have issues with quoting. | |||
<source lang="mtmacro"> | |||
[h: list = json.append("[]", "Peter", "Paul", "Mary")] | |||
</source> | |||
[[Category:Variable Type]] | [[Category:Variable Type]] | ||
Revision as of 14:09, 6 October 2019
The JSON Array is a native JSON Data Type and supported by many MapTool macro functions as an input or output.
JSON.org defines it like this:
An array is an ordered collection of values. An array begins with
[(left bracket) and ends with](right bracket). Values are separated by a,(comma).
An array may hold any of the supported JSON Data Types: Number, String, Object, Array, Boolean and Null.
Examples of JSON Arrays
An array of strings. Note that each name is quoted and the whole array has single quotes around it.
[h: beatles = '["Paul", "John", "George", "Ringo"]']An array of prime numbers. The numbers should not be quoted but the whole array has quotes around it.
[h: primes = "[2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31]"]A better way to initialize an array as you'll be less likely to have issues with quoting.
[h: list = json.append("[]", "Peter", "Paul", "Mary")]