Coalesce (??)

Evaluates Primary first and Fallback only for null/unassigned Primary. It assigns Result without assigning Primary. Other errors propagate; nullable/non-nullable compatibility still applies.

Where to find it

Set Variable → Operations → Choose Operation → Variables. Requires Dev access to configure, then a successful compile to activate.

Inputs

Input	Type	Role	Requirement	Default / constraint
Result	Compatible declared type	Variable binding	Required	Required
Primary	Compatible declared type	Value	Required	Required
Fallback	Compatible declared type	Value	Required	Required

Result and behavior

Stores the result in the first configured destination Variable. Its type must match the result and any generic element/key types.

Configuration example

Block: Set Variable → Operations
Operation: Coalesce (??)
Result: Private Compatible declared type result
Primary: Number 1 (match the destination/element type)
Fallback: Number 1 (match the destination/element type)

Use this as an editor configuration: declare any Variables/collections first and choose real locations/eligible targets for your plot. It is not pasteable source code.

Restrictions and troubleshooting

Runtime validation: Coalesce primary has an invalid stored type.

Related guides

Editor · Arguments · Targets · Expressions · Native behavior

Reference identifier: value.coalesce.