justReturn

The justReturn() function builds a constant function: it ignores its argument and always returns the same value. It also exists in direct form to immediately return that value.

Interactive example

Syntax

Classic signature

function justReturn<
	GenericInput extends unknown, 
	GenericInput extends AnyValue
>(
	input: GenericInput, 
	input: GenericInput
): GenericInput;

Curried signature

function justReturn<
	GenericInput extends unknown, 
	GenericInput extends AnyValue
>(
	input: GenericInput
): (input: GenericInput) => GenericInput;

Parameters

• input : The constant value to return.
• input (direct overload) : A value ignored, useful to stay compatible with callbacks.

Return value

• Curried overload: a function that always returns input regardless of the argument received.
• Direct overload: the value input.

See also

• forward - Simple identity
• pipe - Chain transformations and insert justReturn as a fallback