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Negative numbers can be used as the offsets from the end of the array, {{code|-1}} is the last element in the array, {{code|-2}} is the second to last, and so on. If the {{code|end}} index is smaller than the {{code|start}} index then the array slice is returned in reverse. | Negative numbers can be used as the offsets from the end of the array, {{code|-1}} is the last element in the array, {{code|-2}} is the second to last, and so on. If the {{code|end}} index is smaller than the {{code|start}} index then the array slice is returned in reverse. | ||
| | |examples= | ||
<source lang="mtmacro" line> | <source lang="mtmacro" line> | ||
[h: a = json.fromStrProp("a=1;b=44;c=12")] [r: json.get(a,"b")] | [h: a = json.fromStrProp("a=1;b=44;c=12")] [r: json.get(a,"b")] |
Revision as of 06:45, 31 December 2010
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This article needs: Examples for the new functionality.
json.get() Function
• Introduced in version 1.3b49
Returns the value in a JSON Array at the specified index, returns a slice of a JSON Array from the specified indexes, or returns the value from JSON Object for the specified key.
Usage
json.get(array, index)
json.get(array, start, end)
json.get(object, key, key, ...)
Parameters
array
- The JSON Array to retrieve the element from.index
- The numerical index of the element you want returned.start
- The starting index of the element you wish the slice to begin at.end
- The ending index of the element you wish the slice to end at.object
- The JSON Object to retrieve the element from.key
- The name of a field that should be returned. This parameter can exist more than once, if it does then a JSON Object is returned with all the specified elements.
Negative numbers can be used as the offsets from the end of the array, -1
is the last element in the array, -2
is the second to last, and so on. If the end
index is smaller than the start
index then the array slice is returned in reverse.
Examples
[h: a = json.fromStrProp("a=1;b=44;c=12")] [r: json.get(a,"b")]
[h: a = json.fromList("1,44,12")] [r: json.get(a,1)]
Returns
4444
Version Changes
- 1.3b51 - Added ability to return JSON Array slices.
- 1.3b51 - Added ability to return JSON Objects of select fields from other JSON Objects.