Re:Teaching the Unfortunate Parts
by ufo on Monday December 28, 2020 @09:26PM
(#25566027)
Actually, I think that might work in Javascript! All the numbers are IEE754 floating point numbers and there are separate values for positive and negative zero.
[ Parent
| on HN ]
iirc using numeric literal values there's a coercion step—a console example:
let arr = new Array(10);
// 1e1 => 10
arr[1e1] = 1;
console.log(`arr[10] === 1 => ${arr[10] === 1}`)
console.log(`arr[1e1] === 1 => ${arr[1e1] === 1}`)
arr[0] = 2;
console.log(`arr[0] === 2 => ${arr[0] === 2}`);
console.log(`arr[-0] === 2 => ${arr[-0] === 2}`);
arr[-0] = 3;
console.log(`arr[0] === 3 => ${arr[0] === 3}`);
console.log(`arr[-0] === 3 => ${arr[-0] === 3}`);