Parse out unique class names from resque failed list

resque-failed-stats.js

#!/bin/env node
const fs = require('fs');

// this takes a few seconds
// -u supported from v4
// redis-cli -u `heroku redis:credentials -a pb-com` lrange resque:failed 0 -1 > failed.txt

const log = fs.readFileSync('failed.txt', {encoding:'utf8'});

const ln = log.split('\n');

console.log(ln.length);

const RE = /class":"([^"]+)"/;

const stats = ln.reduce((hash, line) => {
  var m = line.match(RE);
  if (m && m[1])
    hash[m[1]] = hash[m[1]] ? hash[m[1]] + 1 : 1;
  return hash;
}, {});

console.log(stats);