Flip function arguments
Takes a function as an argument, then makes the first argument the last.
- Use argument destructuring and a closure with variadic arguments.
- Splice the first argument, using the spread operator (
...), to make it the last before applying the rest.
const flip = fn => (first, ...rest) => fn(...rest, first); let a = { name: 'John Smith' }; let b = {}; const mergeFrom = flip(Object.assign); let mergePerson = mergeFrom.bind(null, a); mergePerson(b); // == b b = {}; Object.assign(b, a); // == b
