Class

List-Sourced Expression

Abstract intermediate. Captures the "expression that consumes a list-yielding source" pattern. Not directly instantiable — authors instantiate one of the concrete subclasses below.

Class
Subclass Of
Expression

Referenced by

← Domain

Object PropertySourceExpression that yields the list this list-sourced expression operates on. Typically a VarRef to `inputs`, a PropertyRead that returns a list-valued property,…

← Subclass Of

ClassIterating ExpressionAbstract intermediate for expressions that bind each element of `source` to a loop variable and evaluate a per-element body. The body's shape and the way the…
ClassJoinConcatenates the string elements of `source` with `separator` between adjacent pairs. Distinct from Concat (which takes individually authored parts) — Join…
ClassList AggregateAbstract intermediate. Reductions that take a list and yield a scalar (cardinality, sum, min, max). Subclasses add no extra properties — the difference is in…
ClassList Item AtReturns the source list's element at the (0-based) `itemIndex`, or undefined if the index is out of bounds. Used to access individual positions of a…
ClassPairwise MapErgonomic shortcut for the dominant `WindowedMap windowSize: 2` case. For a source `[s_0, s_1, …, s_{n-1}]`, evaluates `pairBody` once per consecutive pair…
ClassReverseReturns the source list with its elements reversed. Useful for rendering newest-first orderings, latest-snapshot-on-top indexes, etc., when the source is in…
ClassScanRunning-aggregation iterator. For a source `[s_0, s_1, …, s_{n-1}]`, evaluates `initialState` once at scan start to seed the accumulator, then evaluates…
ClassWindowed MapSliding-window iterator. For a sorted source `[s_0, s_1, …, s_{n-1}]` of length n and `windowSize: k`, evaluates `windowBody` once for each `i ∈ [0, n-k]` with…