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ABL Reference
Class Properties and Methods Reference : IsNull( ) method (JsonArray)

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


IsNull( INPUT index AS INTEGER )
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 (?).