Functions as values

Pass a function when its caller should choose an operation, or store one for later. The first lessons need only the core path; generic signatures and records also use type parameters and constraints.

• Pass functions as values
• Anonymous functions
• Capture data and private state
• Accept functions and closures through one API
• Borrow in a closure
• Return a closure
• Generic function values
• Transform a cell with a generic method
• Store stateful callbacks
• Store owned closures
• Reduce a borrowed collection with a pipeline
• Transform a stream of values
• Keep callbacks in tuples and lists
• Name stored callbacks
• Store different captured callbacks
• Put a callback in an enum
• Consume a capture
• Consume a callback
• Consume owned data while borrowing local state
• Store consuming jobs