CURRY.js

// variable : type annotation
// name : ArgumentType -> ArgumentType -> ReturnType


// fnAdd : (Num, Num) -> Num
function addFn(a, b) { return a + b; }

// ex.
addFn(1, 2) === 3


// arrowAdd : (Num, Num) -> Num
const arrowAdd = (a, b) => a + b;

// ex.
arrowAdd(1, 2) === 3


// curryAdd : Num -> Num -> Num
const curryAdd = a => b => a + b + c;

// ex.
curryAdd(2)(1) === 3


// add2 : Num -> Num
const add2 = curryAdd(2);

// ex.
add2(1) === 3


// gulpPlugin : Object -> () -> GulpStream
const gulpPlugin = options => () => {
	return through.obj((file, enc, done) {
		done(null, file);
	})
}

// ex.
gulp.src('*')
	.pipe(gulpPlugin({ prop: 'value' }))
	.dest('dist')


const genericError = errCode => errorMsg => {
	console.log(`${errCode}: ${errorMsg}`);
}

genericError(404)('page is missing') // 404: page is missing

const pageMissingError = genericError(404);
pageMissingError('page is missing') // 404: page is missing