let someArray = [1, 2, , 4];
console.log(as.numbers(someArray) === someArray); // => true
for (let number of numbers) {
// This should be safe because I know everything in the array is a number, right?
console.log(number.toFixed(2)); // => TypeError: number is undefined
}
I mean, it's probably fine if you're only ever getting your data from JSON.parse(). But I would hesitate to use this in production.
You use a different function than Validate_Parsed_JSON in those cases. But most typescript programs are only going to need JSON-compatible input. Maybe some XML but that's also going to have similar formulaic output from your parser.
If something can directly hand you a maliciously built data structure, you're probably designing your system wrong. Are you running untrusted javascript in the same interpreter? That's a very hard problem that should be avoided if at all possible.
Basically, only working on JSON.parse is something to document but it's not at all a weird restriction, or a reason to balk at putting it into production.
