CODEWITHSUNDEEP
javascriptnode.js
Alec Fenichel
Alec Fenichel

Reputation: 1317

JavaScript JSON find and delete

I have a complex JSON file with arrays and objects containing arrays and objects down about 10 levels. I load the JSON file into Node.js. I am trying to write a function that searches the entire object including all sub objects and sub arrays and deletes any key with a specific name. This is what I have:

function deleteKey(object, key) {
  for(var property in object) {
    if(property==key) {
      delete object[property];
    } else {
     deleteKey(object[property], key);
    }
  }
}

I am getting a stack size exceeded error. Is there a better way?

Upvotes: 2

Views: 1250

Answers (1)

emars
emars

Reputation: 116

Assuming as you would want this function to work on a JavaScript object of any depth, this would be a good situation to take advantage of recursion.

function deleteKey(object, key) {
  for(var property in object) {
    if(property==key) {
      delete object[property];
    } else {
      if(object[property] !== null && typeof object[property] == 'object'){
        deleteKey(object[property], key);
      }
    }
  }
}

Upvotes: 3

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