let x = "Hello"; let x = x + ", World!"; console.log(x);
It prints "Hello, World!", right? So how about this?
new Promise((resolve, reject) => resolve("Hello")) .then((a) => (a + ", World)) .then((a) => console.log(a));
It does the same thing, right?
Okay, so let me ask you an important question: in the second code sample, where are the semicolons?
That's one of the most interesting questions in functional programming. Let me explain why: