Add a function `replace()`

emis_funky_funktions.py

@@ -48,6 +48,19 @@ def ident(x: A) -> A:
 	"The identity function.  Output is identical to input."
 	return x
 
+def replace(replace_with: A) -> Callable[..., A]:
+	"""
+	Get a function which always returns a constant value, regardless of input
+
+	The argument `replace_with` is the value the the returned function should always
+	return.  The returned function can be used as if having any arity, and will always
+	return the same value originally passed to `replace`.
+	"""
+	def constant(*args: Any, **kwargs: Any) -> A:
+		"Always return a constant value, typically the one passed to `replace`"
+		return replace_with
+	return constant
+
 # Partial Appliaction shorthand
 p = partial
 "An alias for partial application"