how to cast byte in javascript like in java?

Question

in java

System.out.println((byte) (31330 >> 4));

output : -90

in javascript

console.log(31330 >> 4);

output : 1958

how to get output -90 in javascript like cast (byte) in java?

do you mean like this ``` console.log(~~(31330 >> 4)); ``` it still return 1958 — Noer Cholis
– Noer Cholis, Commented May 22, 2021 at 18:59
I don't know how to get the result you're looking for. However, the explanation for this is the fact that JavaScript bit shift operators (<< and >>) work with signed 32-bit integers. There isn't exactly a byte type in JavaScript. — Matt U
– Matt U, Commented May 22, 2021 at 19:00

georg · Accepted Answer · 2021-05-22 19:12:56Z

2

In JS there's no byte type, but we've got "array of bytes", so you can create an array from your expression and then pick the first element:

console.log(new Int8Array([31330 >> 4])[0])

answered May 22, 2021 at 19:12

georg

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