List.Reduce

List.Reduce(list : list, expression : str, value : any) : any

Combine all values in list into a single value using the supplied expression.

9.02 or later.

Name	Type	Description
list	list	list value
expression	str	expression to compute combined value (use '$value' and '$item' to refer to the current value and item, respectively)
value	any?	starting value (optional, default: nil)

A single value representing the combination of lists values using the supplied expression

Output

Concatenate all list items with a ":" separator:

{{list.reduce(["a","b","c"],"$value .. ':' .. $item ")}}

:a:b:c

Concatenate all list items with a leading string:

{{list.reduce(["middle","end"],"$value .. '-' .. $item ", "start")}}

start-middle-end

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