Recursively transform JSON keys

recursive_json_key_transform.js

var fs = require('fs')
var _ = require('lodash')
var humps = require('humps')
var input = require('./input.json')
var outputFile = './output.json'

function processObj(val) {
  if (_.isArray(val)) {
    return val.map(item => processObj(item))
  }
  if (_.isObject(val)) {
    val = _.mapKeys(val, (val, key) => humps.camelize(key))
    for (k in val) {
      val[k] = processObj(val[k])
    }
    return val
  }
  return val
}

var output = JSON.stringify(processObj(input), null, 2)
fs.writeFileSync(outputFile, output, 'utf8')