DEV Community

Discussion on: 7 Killer JavaScript One-Liners that you must know

View post
Collapse
 
arnavkr profile image
Arnav Kumar • • Edited

Nice but there are some errors

like in tip 7
there should not be . after the isArray and there shouldn't be a , at the end it should be ;

fixed code

let fruit = 'apple';
let fruits = ["apple", "banana", "mango", "orange", "grapes"];

const isArray = (arr) => Array.isArray(arr);

console.log(isArray(fruit)); //output - false
console.log(isArray(fruits)); //output- true
Enter fullscreen mode Exit fullscreen mode
Collapse
 
thumbone profile image
Bernd Wechner • • Edited

Poe's Law (look it up if you need to it's an essential part of modern internet vocabulary)

As in surely, when I read this, I read it as a parody, a joke ...

Replacing this:

console.log(Array.isArray(fruit)); //output - false
Enter fullscreen mode Exit fullscreen mode

with this:

console.log(isArray(fruit)); //output - false
Enter fullscreen mode Exit fullscreen mode

is a killer one-liner indeed. Well the killer one-liner is in fact:

const isArray = (arr) => Array.isArray(arr);
Enter fullscreen mode Exit fullscreen mode

As in, it's one line, no-one needs (a killer).

And on a close inspection the errors aside (a hasty post it seems) they all seem to be in jest.