Interlude.Compute.Constant
In Depth¶
Compute.Constant(value: null)
A fixed value that never changes.
Not useful on its own — a computed field holding a constant is a label with extra steps. It exists to be fed into the nodes that take computations on both sides: the number to multiply by in Compute.Arithmetic, or either branch of Compute.If.
The inputs are:
value(object, defaults tonull) — The value.
Returns computation — The computation.
Search terms: constant, literal, fixed, value.
About the Compute nodes¶
Values worked out from other answers, for use with Behavior.WithComputed.
A computed field is driven by the form rather than by the user: it recalculates whenever anything it reads changes, in dependency order, so a total built on a subtotal is always consistent. Computed values that depend on each other in a loop are rejected when the form is built, before a window appears.
Example File¶
An example graph ships beside this page: Interlude.Compute.Constant.dyn
The form it builds:
