how to get length of multi array in one object

I have object like this (nodename)

{
  BGF: [
    'bgf-simulator-pn',
    'bgf-simulator',
    'bgf-simulator-2',
    'bgf-1-error'
  ],
  Baseband: [ 'baseband_2', 'baseband_1' ],
  CCPC: [ 'ccpc-emulator' ],
  CCRC: [ 'ccrc-emulator' ],
  CEE: [ 'cee' ],
}

I want get length of array key

I used this way

    const nodename = await topologyBrowser.nodes();
    const arrayLength = Object.keys(nodename).length;
    console.log(arrayLength);

and console log return 5, but I want 9,

what did I wrong,
what should I do guys

>Solution :

You can make use of Array#reduce() method:

const nodename = {
  BGF: [
    'bgf-simulator-pn',
    'bgf-simulator',
    'bgf-simulator-2',
    'bgf-1-error'
  ],
  Baseband: [ 'baseband_2', 'baseband_1' ],
  CCPC: [ 'ccpc-emulator' ],
  CCRC: [ 'ccrc-emulator' ],
  CEE: [ 'cee' ],
};

const result = Object.values(nodename).reduce((res, curr) => res + curr.length, 0);

console.log(result);