I want to get sequence information!


After getting the number of arrays and storing them in a custom field
To obtain array information using a custom field as an array parameter
I don't know how to expand custom fields.

Can anyone tell me?

sample code

	ruby {
		code => "event.set('arry_max',event.get('file_test').length - 1)"
	mutate {
		add_field =>["file_name_test" => "%{[file_name][%{arry_max}★←Bad]}"]

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