whenIsBoolTruthy

Callback executed only for EitherBoolTruthy values. Otherwise, the initial value is returned.

Interactive example

Syntax

Classic signature

function whenIsBoolTruthy<
  const GenericInput extends unknown,
  const GenericOutput extends AnyValue | EscapeVoid
>(
  input: GenericInput,
  theFunction: (value: Unwrap<Extract<ToEither<GenericInput>, EitherBoolTruthy>>) => GenericOutput
): GenericOutput | Exclude<ToEither<GenericInput>, EitherBoolTruthy>;

Curried signature

function whenIsBoolTruthy<
  const GenericInput extends unknown,
  const GenericOutput extends AnyValue | EscapeVoid
>(
  theFunction: (value: Unwrap<Extract<ToEither<GenericInput>, EitherBoolTruthy>>) => GenericOutput
): (input: GenericInput) => GenericOutput | Exclude<ToEither<GenericInput>, EitherBoolTruthy>;

Parameters

• theFunction: Function executed only when the value is truthy.
• input: Value or Either to process (optional in the curried version).

Return value

The result of theFunction for truthy values, otherwise the original value (EitherBoolFalsy).

See also

• whenIsBoolFalsy.
• bool – To generate the truthy/falsy source.