.<

.< is a macro that builds a unary composed function by composing its inputs from right to left.

Syntax

(.< ⟨expr⟩...)

Semantics

• (.< f g h) expands to a unary function equivalent to (fn (x) (f (g (h x)))).
• It follows the same order as ordinary mathematical composition.
• Because it is a macro, it is syntax for building a function, not itself a first-class function value.
• It works in the opposite direction as .>.

Example

(.< show reverse sort)