Replace dot to underscore in js object keys names

Question

I need to walk js object and replace all dots to underscores in this object keys.
For example

{a.a:"test"}
to
{a_a:"test"}

This is my code.

Object.getOwnPropertyNames(match).forEach(function(val, idx, array) {
    if(val.indexOf(".") != -1){
       val.replace(/\./g,'_');
    }
});

Thanks, but I have problem in object not so simple, like this

{
"a.a":{
   "nee.cc":"sdkfhkj"
},
"b.b": "anotherProp"
}

Answer 1

Using lodash, here's a function that will recursively replace the dots with underscores for each of the object's keys.

And added a test to verify results.

function replaceDotWithUnderscore(obj) {
  _.forOwn(obj, (value, key) => {

    // if key has a period, replace all occurences with an underscore
    if (_.includes(key, '.')) {
      const cleanKey = _.replace(key, /\./g, '_');
      obj[cleanKey] = value;
      delete obj[key];
    }

    // continue recursively looping through if we have an object or array
    if (_.isObject(value)) {
      return replaceDotWithUnderscore(value);
    }
  });
  return obj;
}

// --------------------------------------------------
// Run the function with a test to verify results
// -------------------------------------------------

var input = {
  "a.a": {
    "nee.cc": "sdkfhkj"
  },
  "b.b": "anotherProp"
};

var result = replaceDotWithUnderscore(input);

// run a quick test to make sure our result matches the expected results...
var expectedResult = {
  "a_a": {
    "nee_cc": "sdkfhkj"
  },
  "b_b": "anotherProp"
};

console.log(result);
console.assert(_.isEqual(result, expectedResult), 'result should match expected result.');

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>