On Wednesday, January 6, 2016 at 9:03:22 PM UTC-8, Matabele wrote:
>
> I don't seem to understand the following functions:
> -- getTiddlerData()
> -- setTiddlerData()
> -- extractTiddlerDataItem()
>
> I am trying to:
> -- extract an entry from a data index
> -- convert this data to an array
> -- manipulate the array
> -- then save the modified array back to the data index.
>
Here's what I use:
var data = this.wiki.getTiddlerData("TiddlerTitle",{});
var val = data["index_name"];
// ... your code here.... modify 'val'...
data["index_name"] = val;
this.wiki.setTiddlerData("TiddlerTitle",data);
The 2nd param in getTiddlerData is a fallback data object (usually empty),
that is used if the specified tiddler is missing. The object property
name/value pairs correspond to the index/value pairs stored in the
DataTiddler. To add an index to a tiddler, just assign a value into the
data array, e.g.,
data["some_new_index_name" = somevalue;
To remove an index from a DataTiddler, set it's value to "undefined" (no
quotes).
data["some_new_index_name" = undefined;
When the data object is written back to the tiddler, the entire text
content of the tiddler is overwritten with the name/value pairs from the
modified object, effectively adding/removing/updating all the individual
indices at once.
enjoy,
-e
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