This function creates a comma-separated list of the keys contained in map a. The keys will be sorted alphabetically in a case-insensitive way.

A separator between the keys can be specified in b.

Optionally, you can return a key at position c instead of the whole list.

Parameters

Parameter	Description
a	(optional) Name of the map. Default: "default".
b	(optional) Separator between keys. Default: ",".
c	(optional) Position in the key list that should be returned (starts at "1"). Use -"1" for the iteration level.

Examples

Given is a map "myMap" containing the key-value pairs {1key=val1, Key1=val2, key2=val3}.