.slice is not a function

[grzegorzbernat]

I have got problem similiar to issue#4. I have now newest version of Node.JS (v.8.2.1) and I am running everything on Linux.
When I was trying to run of examples (readTag.js) from this library (and also mifare-classic examples) I got error:
`WARNING: End of message does not look correct. Expecting 0xFE but got 110
<Buffer d1 01 08 54 02 65 6e 48 65 6c 6c 6f>
/home/pi/magisterka/ndef-js/lib/ndef.js:276
var bytes = bytes.slice(0), // clone since parsing is destructive
^

TypeError: bytes.slice is not a function
at Object.decodeMessage (/home/pi/magisterka/ndef-js/lib/ndef.js:276:27)
at printNdefInfo (/home/pi/magisterka/ndef-js/examples/readTag.js:16:20)
at ChildProcess. (/home/pi/magisterka/ndef-js/examples/readTag.js:53:9)
at emitTwo (events.js:125:13)
at ChildProcess.emit (events.js:213:7)
at maybeClose (internal/child_process.js:921:16)
at Socket.stream.socket.on (internal/child_process.js:348:11)
at emitOne (events.js:115:13)
at Socket.emit (events.js:210:7)
at Pipe._handle.close [as _onclose] (net.js:549:12)
`

I dont know what should I change to support this version of Node?

[don]

decodeMessage is expecting an array of bytes, which should have a slice function. If you're passing in a Uint8Array or Buffer it'll probably fail.

[grzegorzbernat]

I tried to run readTag example from this library as is. But it failed.

var spawn = require('child_process').spawn,
    ndef = require('../index'),
    fs = require('fs'),
    mifareClassic = require('../lib/mifare-classic'),
    fileName = 'foo.mfd';
        
function printNdefInfo() {
    buffer = fs.readFileSync(fileName);
    ndefBuffer = mifareClassic.getNdefData(buffer);
    console.log(ndefBuffer);

    message = ndef.decodeMessage(ndefBuffer.toJSON());
    console.log(message);

(...)

When I have modified this example and I passed data to decoding, it worked.
message = ndef.decodeMessage(ndefBuffer.toJSON().data);

But I think there is some problem with library and/or Node.JS version because in raw version of examples were errors.

[don]

@greggyPL message = ndef.decodeMessage(ndefBuffer.toJSON().data); works because the original code was written for Node v0.8. Node v0.10 changed the JSON for Buffer. I modified ndef.decodeMessage to take a Buffer so this is unnecessary.