I have a variable Uint8Arr of type Uint8Array[4].
Uint8Arr[0]=0x12;
Uint8Arr[1]=0x19;
Uint8Arr[2]=0x21;
Uint8Arr[3]=0x47;
I want to convert Uint8Arr into its equivalent integer which is 0x12192147 or 303636807.
I would like to have a function that can convert Uint8Arr[n] into its equivalent integer and return the result in decimal.
For those who want little-endian, you can specify endianness using the DataView class.
let buff = new Uint8Array(4);
buff[0]=0x12;
buff[1]=0x19;
buff[2]=0x21;
buff[3]=0x47;
var view = new DataView(buff.buffer, 0);
view.getUint32(0, true); // true here represents little-endian
This solution will solve for Uint8Arr of any length.
function convert(Uint8Arr) {
var length = Uint8Arr.length;
let buffer = Buffer.from(Uint8Arr);
var result = buffer.readUIntBE(0, length);
return result;
}
Uint8Array[16] and needed the following change to get it to work: ``` let result = buffer.readUInt32BE(0); ```
parseInt(buffer.toString('hex',0,7),16). In the first step, buffer is converted to string, using 'hex' encoding, start and stop byte (0 and 7). Then parseInt is used to convert this hex number into decimal...This is one solution:
let Uint8Arr = new Uint8Array(4);
Uint8Arr[0]=0x12;
Uint8Arr[1]=0x19;
Uint8Arr[2]=0x21;
Uint8Arr[3]=0x47;
let buffer = Buffer.from(Uint8Arr);
console.log( buffer.readUInt32BE(0) );
