index.js
function setDefaults() {
    // sequence: generate a random 3-byte integer initial value for the sequence counter
    if (seq === undefined)
        seq = ~~(Math.random() * 0xffffff)

    // processId: 2-byte integer derived from the PID assigned by the OS
    if (pid === undefined)
        pid = process.pid % 0xffff

    // machineId: first three bytes of the md5 hash calculated from OS hostname
    if (mid === undefined)
        mid = crypto.createHash('md5')
                    .update(os.hostname())
                    .digest()
                    .slice(0, 3)
                    .readUIntBE(0, 3)

    // reset the counter
    // (if `mid` or `pid` changes then previously allocated ids in the current second are freed)
    ctr = 0

    // `unique` is the fixed-length composition of `mid` and `pid`
    unique = pad(mid, 6, 16) + pad(pid, 4, 16)

    // calculate the initial sequence prefix
    seqpref = pad(~~(seq / 16), 5, 16)
}
function setDefaults() {
    // sequence: generate a random 3-byte integer initial value for the sequence counter
    if (seq === undefined)
        seq = ~~(Math.random() * 0xffffff)

    // processId: 2-byte integer derived from the PID assigned by the OS
    if (pid === undefined)
        pid = process.pid % 0xffff

    // machineId: first three bytes of the md5 hash calculated from OS hostname
    if (mid === undefined)
        mid = crypto.createHash('md5')
                    .update(os.hostname())
                    .digest()
                    .slice(0, 3)
                    .readUIntBE(0, 3)

    // reset the counter
    // (if `mid` or `pid` changes then previously allocated ids in the current second are freed)
    ctr = 0

    // `unique` is the fixed-length composition of `mid` and `pid`
    unique = pad(mid, 6, 16) + pad(pid, 4, 16)

    // calculate the initial sequence prefix
    seqpref = pad(~~(seq / 16), 5, 16)
}
function setDefaults ( ) { // sequence: generate a random 3-byte integer initial value for the sequence counter if ( seq === undefined ) seq = ~ ~ ( Math . random ( ) * 0xffffff ) // processId: 2-byte integer derived from the PID assigned by the OS if ( pid === undefined ) pid = process . pid % 0xffff // machineId: first three bytes of the md5 hash calculated from OS hostname if ( mid === undefined ) mid = crypto . createHash ( 'md5' ) . update ( os . hostname ( ) ) . digest ( ) . slice ( 0 , 3 ) . readUIntBE ( 0 , 3 ) // reset the counter // (if `mid` or `pid` changes then previously allocated ids in the current second are freed) ctr = 0 // `unique` is the fixed-length composition of `mid` and `pid` unique = pad ( mid , 6 , 16 ) + pad ( pid , 4 , 16 ) // calculate the initial sequence prefix seqpref = pad ( ~ ~ ( seq / 16 ) , 5 , 16 ) }
Initialize values for calculations.
Initialize values for calculations .