Mapping answers to questions

answer_to_questions.js

let questions = [{
    "form_criteria_id": "46",
    "field_name": "pumpstation_general",
    "field_label": "General repairs required?",
    "mandatory": false,
    "action": "dropdown",
    "input_type": [{
        "id": 7,
        "text": "Yes",
        "value": "yes",
        "created_at": "2018-10-21 22:36:18",
        "updated_at": "2018-10-21 22:36:18"
      },
      {
        "id": 8,
        "text": "No",
        "value": "no",
        "created_at": "2018-10-21 22:36:18",
        "updated_at": "2018-10-21 22:36:18"
      }
    ],
    "value": ""
  },
  {
    "form_criteria_id": "60",
    "field_name": "pumpstation_control_panel_photo",
    "field_label": "Control panel photos",
    "mandatory": false,
    "action": "upload",
    "input_type": [

    ],
    "value": ""
  }
];

let answers = [{
  "id": "1",
  "form_id": 1,
  "form_criteria_id": 46,
  "form_criteria_option_id": 7,
  "value": "yes",
  "text": "Yes"
}];

//  Avoid n * m by creating a map first. This reduces complexity to n + m instead.
let answersCriteriaMap = [];
answers.forEach(answer => {
  answersCriteriaMap[answer.form_criteria_id] = answer;
});

questions.forEach(question => {
  if ((matchingAnswer = answersCriteriaMap[question.form_criteria_id])) {
    return question.value = matchingAnswer.value;
  }
});

console.log(questions);