How to modify each JSON object javascript

Question

I would like to modify each JSON value inside the cooldown object

{
  "cooldown":{
    "user": 1, // This
    "user2": 0 // This
  }
}

using a for statement in Javascript.

I've researched for hours and only could find a for inside [] blocks.

Edit

This is what I've tried:

for (var i in db["cooldown"]) {
  i = time.ms;
}

This is not clear. What is your current JSON and what is the expected outcome you want. — andybeli
– andybeli, Commented Jul 4, 2016 at 11:37
I believe what you are actually asking is how to loop over each key/value pair in an object. If this is the case, perhaps this post will be helpful - stackoverflow.com/questions/7241878/… — Lix
– Lix, Commented Jul 4, 2016 at 11:39
Your solution is close - but the i variable you are getting is not the value - it is the key. So you'd need to do something like db["cooldown"][i] — Lix
– Lix, Commented Jul 4, 2016 at 11:40

Nenad Vracar · Accepted Answer · 2016-07-04 11:41:09Z

2

You can use Object.keys() to return array of keys and then use forEach() to loop that array and return each value.

var data = {
  "cooldown": {
    "user": 1, // This
    "user2": 0 // This
  }
}

Object.keys(data.cooldown).forEach(function(e) {
  console.log(data.cooldown[e]);
})

You can also use for...in loop

var data = {
  "cooldown": {
    "user": 1, // This
    "user2": 0 // This
  }
}

for (var k in data.cooldown) {
  console.log(data.cooldown[k]);
}

edited Jul 4, 2016 at 11:41

answered Jul 4, 2016 at 11:38

Nenad Vracar

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8 Comments

swagster Over a year ago

Does this require JQuery?

swagster Over a year ago

So I'm trying to create an if statement to check if a value is equal to zero, and it's completely ignoring that. Would you like me to post my code in an edit or ask a new question?

swagster Over a year ago

I added a comment inside the fiddle to explain what I want to do.

Nenad Vracar Over a year ago

Its never zero its -1 and 5.

swagster Over a year ago

So change the if statement to be == -1?

|

Nageshwar Reddy Pandem · Accepted Answer · 2016-07-04 11:49:02Z

1

You can also use for..in method to loop through the object

var jsonObj = {
    "cooldown":{
    "user": 1,
    "user2": 0
  }
};


for(var key in jsonObj["cooldown"]){
    jsonObj["cooldown"][key] = "modified value";
}

console.log(jsonObj);

answered Jul 4, 2016 at 11:49

Nageshwar Reddy Pandem

1,0479 silver badges15 bronze badges

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