CODE EXAMPLE FOR JAVASCRIPT

javascript return function

// Javascript double parentheses
// first function call result in a function that is called

function a() {
        return (name = 'b') => console.log(`I'm function ${name} produced by a()`);
}

a()();
a()('b2');

// result :
// I'm function b produced by a()
// I'm function b2 produced by a()