mergeByObjectProperty.js

export default let mergeByObjectProperty = (mainArray, mergingArray, property) => {

  // For every entry in the merging array (smaller)
  _.each(mergingArray, (mergingArrayEntry) => {

    // Find the corresponding object from arrayOne
    var mainArrayEntry = _.find(mainArray, (arr1obj) => {
      return arr1obj[property] === mergingArrayEntry[property]
    })

    // If there already exists this object in the main array
    if (mainArrayEntry) {
      // Merge the objects
      _.extend(mainArrayEntry, mergingArrayEntry)
    } else {
      // Otherwise (not in the main array), add it!
      mainArray.push(mergingArrayEntry)
    }

  })

}