Splat

Introduction

This package provides functions analogous to the "splat" operator in other languages, unpacking list elements into function arguments. All arguments must be of the same type, given that lists cannot contain disparate types.

Functions

splat2 : (a -> a -> b) -> List a -> Maybe b

Unpack the first 2 elements of a list as function arguments. Returns the result as Maybe, with Nothing if the list is shorter than 2 elements or Just result if the list could be unpacked successfully. If the function takes more than 2 arguments, the result will be a partially applied form of the function wrapped in Just.

Example:

splat2 String.append [ "butter", "fly" ] == Just "butterfly"

splat3 : (a -> a -> a -> b) -> List a -> Maybe b

Unpack the first 3 elements of a list as function arguments. Returns the result as Maybe, with Nothing if the list is shorter than 3 elements or Just result if the list could be unpacked successfully. If the function takes more than 3 arguments, the result will be a partially applied form of the function wrapped in Just.

Example:

splat3 String.replace [ ",", "/", "a,b,c,d,e" ] == Just "a/b/c/d/e"

splat4 : (a -> a -> a -> a -> b) -> List a -> Maybe b

Unpack the first 4 elements of a list as function arguments. Returns the result as Maybe, with Nothing if the list is shorter than 4 elements or Just result if the list could be unpacked successfully. If the function takes more than 4 arguments, the result will be a partially applied form of the function wrapped in Just.

splat5 : (a -> a -> a -> a -> a -> b) -> List a -> Maybe b

Unpack the first 5 elements of a list as function arguments. Returns the result as Maybe, with Nothing if the list is shorter than 5 elements or Just result if the list could be unpacked successfully. If the function takes more than 5 arguments, the result will be a partially applied form of the function wrapped in Just.

splat6 : (a -> a -> a -> a -> a -> a -> b) -> List a -> Maybe b

Unpack the first 6 elements of a list as function arguments. Returns the result as Maybe, with Nothing if the list is shorter than 6 elements or Just result if the list could be unpacked successfully. If the function takes more than 6 arguments, the result will be a partially applied form of the function wrapped in Just.

splat7 : (a -> a -> a -> a -> a -> a -> a -> b) -> List a -> Maybe b

Unpack the first 7 elements of a list as function arguments. Returns the result as Maybe, with Nothing if the list is shorter than 7 elements or Just result if the list could be unpacked successfully. If the function takes more than 7 arguments, the result will be a partially applied form of the function wrapped in Just.

splat8 : (a -> a -> a -> a -> a -> a -> a -> a -> b) -> List a -> Maybe b

Unpack the first 8 elements of a list as function arguments. Returns the result as Maybe, with Nothing if the list is shorter than 8 elements or Just result if the list could be unpacked successfully. If the function takes more than 8 arguments, the result will be a partially applied form of the function wrapped in Just.

splat9 : (a -> a -> a -> a -> a -> a -> a -> a -> a -> b) -> List a -> Maybe b

Unpack the first 9 elements of a list as function arguments. Returns the result as Maybe, with Nothing if the list is shorter than 9 elements or Just result if the list could be unpacked successfully. If the function takes more than 9 arguments, the result will be a partially applied form of the function wrapped in Just.