IsNull( ) method (JsonArray)

Returns a LOGICAL indicating if an element in a JsonArray contains the null value.

Return type:

LOGICAL

Access:

PUBLIC

Applies to:

Progress.Json.ObjectModel.JsonArray class

 

Syntax 

IsNull( INPUT index AS INTEGER )

index

An INTEGER identifying the element to be tested. Indexing into JsonArrays is 1-based.

A JsonError is raised if index is less than 1, is greater than the length of the JsonArray, or is the Unknown value (?).