Show the Bitcoin SV nodes from JSON returned from getpeerinfo

output.txt

/Bitcoin SV:0.1.0(EB128.0; bitcoin-abc)/ 3.120.248.245:8333
/Bitcoin SV:0.1.0(EB128.0)/ 47.92.157.192:8333
/Bitcoin SV:0.1.0(EB128.0)/ 77.72.125.206:8333
/Bitcoin SV:0.1.0(EB128.0)/ 138.201.221.79:8333

sv_nodes.js

// Return a list of Bitcoin SV nodes.
//
// Usage:
//
//     node ./sv_nodes.js peerinfo.json
//
// where "sv_nodes.js" is the name of this file, and "peerinfo.json" was
// created from the following command.
//
//     bitcoin-cli getpeerinfo > peerinfo.json
//
// Author : Scott Barr
// Date   : 17 Nov 2018

const fs = require('fs');

// get the filename from the args (assumes you give the filename as the arg)
const filename = process.argv[2];

// read the file
const content = fs.readFileSync(filename);

// parse the JSON
const peers = JSON.parse(content);

// filter the nodes, giving only nodes that claim to be "Bitcoin SV"
peers
  .filter(o => o.subver.startsWith('/Bitcoin SV'))
  .forEach(o => console.log(o.subver, o.addr));