title: Parsing from a JSON file in Ruby and Extract numbers from Nested Hashes
body: <p>Now I am working on extracting information from a JSON file in Ruby. Then how can I extract just the numbers next to the word 'score' from the following text file? For example, I want to get 0.6748984055823062, 0.6280145725181376 on and on.</p>
  
  <pre><code>{
    "sentiment_analysis": [
      {
        "positive": [
          {
            "sentiment": "Popular",
            "topic": "games",
            "score": 0.6748984055823062,
            "original_text": "Popular games",
            "original_length": 13,
            "normalized_text": "Popular games",
            "normalized_length": 13,
            "offset": 0
          },
          {
            "sentiment": "engaging",
            "topic": "pop culture-inspired games",
            "score": 0.6280145725181376,
            "original_text": "engaging pop culture-inspired games",
            "original_length": 35,
            "normalized_text": "engaging pop culture-inspired games",
            "normalized_length": 35,
            "offset": 370
          },
       "negative": [
      {
        "sentiment": "get sucked into",
        "topic": "the idea of planning",
        "score": -0.7923352042939829,
        "original_text": "Students get sucked into the idea of planning",
        "original_length": 45,
        "normalized_text": "Students get sucked into the idea of planning",
        "normalized_length": 45,
        "offset": 342
      },
      {
        "sentiment": "be daunted",
        "topic": null,
        "score": -0.5734506634410159,
        "original_text": "initially be daunted",
        "original_length": 20,
        "normalized_text": "initially be daunted",
        "normalized_length": 20,
        "offset": 2104
      },
  </code></pre>
  
  <p>What I have tried is that I could read a file and set the text file to a hash variable using the JSON method.</p>
  
  <pre><code>require 'json'
  json = JSON.parse(json_string)
  </code></pre>