NiFi Ingest 26.3
NiFi Ingest

# empty

The `empty` method checks whether the JSON array is empty.

## Syntax

    empty()

## Returns

(Boolean). Returns `true` if the array is empty.

## Example

    local myJsonArray = LuaJsonArray:new(4,"a string",true)

    print ("Is the array empty?  " , myJsonArray:empty() )
    -- Is the array empty?   false

    myJsonArray:clear()

    print ("Is the array empty?  " , myJsonArray:empty() )
    -- Is the array empty?   true

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Version 26.3 | Last updated July 2026

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Product: Knowledge Discovery NiFi Ingest 26.3

Topic Title: empty