find number of packages in still < 1.0.0 according to search cache

stillInZero.js

var columnify = require('columnify')
var fs = require('fs')
var results = [];
var packages = JSON.parse(fs.readFileSync(process.env.HOME + '/.npm/registry.npmjs.org/-/all/.cache.json'))
var packageNames = Object.keys(packages)

// only count packages with dist-tags + latest
var validPackages = packageNames.filter(function(name) {
  var item = packages[name];
  return (
    item["dist-tags"] &&
    item["dist-tags"]["latest"]
  )
})

var counts = validPackages.reduce(function(counts, name) {
    var major = parseInt(packages[name]["dist-tags"]["latest"].split('.')[0], 10)
    counts[major] = counts[major] + 1 || 1
    return counts
}, {})

var countsMeta = Object.keys(counts).map(function(major) {
  return {
    "major": major,
    total: counts[major],
    percent: (counts[major]/validPackages.length * 100).toFixed(2) + '%'
  }
})

console.log('')
console.log('Number of packages in the registry at particular major versions:')
console.log('')
console.log(columnify(countsMeta))