AI prompt for generating flat json

generating-flat-json.txt

# Prompt

Could you write me a js program using lodash that will take a nested json structure like this
{
    "today": "Today",
    "greeting": {
        "morning": "1",
        "evening": "2"
    },
    "title": {
      "morning": {
        "test": "1"
      }
    }
}
and convert it to something like this
{
  "today": "Today",
  "greeting.morning": "1",
  "greeting.evening": "2",
  "title.morning.test": "1"
}

# Response

Certainly! You can use lodash to achieve this by writing a function that recursively flattens the nested JSON structure. Here's a JavaScript program that does that:

```javascript
const _ = require('lodash');

function flattenObject(obj, parentKey = '', result = {}) {
    _.forOwn(obj, (value, key) => {
        const newKey = parentKey ? `${parentKey}.${key}` : key;
        if (_.isObject(value) && !_.isArray(value)) {
            flattenObject(value, newKey, result);
        } else {
            result[newKey] = value;
        }
    });
    return result;
}

const nestedJson = {
    "today": "Today",
    "greeting": {
        "morning": "1",
        "evening": "2"
    },
    "title": {
        "morning": {
            "test": "1"
        }
    }
};

const flattenedJson = flattenObject(nestedJson);
console.log(flattenedJson);
```

This program uses lodash's `_.forOwn` to iterate over the properties of the object. It checks if the value is an object and not an array, and if so, it recursively flattens it. Otherwise, it adds the key-value pair to the result object with the appropriate key.

When you run this program, it will output:

```json
{
  "today": "Today",
  "greeting.morning": "1",
  "greeting.evening": "2",
  "title.morning.test": "1"
}
```

This is the desired flattened JSON structure.