Flip takes a function as an argument, then makes the first argument the last.
Return a closure that takes variadic inputs, and splices the last argument to make it the first argument before applying the rest.
const flip = fn => (...args) => fn(args.pop(), ...args); +
Flip takes a function as an argument, then makes the first argument the last.
Return a closure that takes variadic inputs, and splices the last argument to make it the first argument before applying the rest.
const flip = fn => (first, ...rest) => fn(...rest, first);
let a = { name: 'John Smith' }; let b = {}; const mergeFrom = flip(Object.assign); diff --git a/snippets/flip.md b/snippets/flip.md index 02dbe84c7..7473527ef 100644 --- a/snippets/flip.md +++ b/snippets/flip.md @@ -4,11 +4,11 @@ Flip takes a function as an argument, then makes the first argument the last. Return a closure that takes variadic inputs, and splices the last argument to make it the first argument before applying the rest. -```js +```js const flip = fn => (first, ...rest) => fn(...rest, first); ``` -```js +```js let a = { name: 'John Smith' }; let b = {}; const mergeFrom = flip(Object.assign);