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, Jul 04 '16 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 - http://stackoverflow.com/questions/7241878/for-in-loops-in-javascript-key-value-pairs — Lix, Jul 04 '16 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, Jul 04 '16 at 11:40
Those are not "JSONs". They are just plain old "fields", "properties", "key-value pairs", etc. — hippietrail, Jul 04 '16 at 12:31

Nenad Vracar · Accepted Answer · 2016-07-04T11:41:09.657

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 04 '16 at 11:41

answered Jul 04 '16 at 11:38

Nenad Vracar

118,580
15
151
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Does this require JQuery? – swagster Jul 04 '16 at 11:40
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 Jul 04 '16 at 11:52
I added a comment inside the fiddle to explain what I want to do. – swagster Jul 04 '16 at 11:57
Its never zero its -1 and 5. – Nenad Vracar Jul 04 '16 at 11:59
So change the if statement to be == -1? – swagster Jul 04 '16 at 12:01
I am not sure if this is what you want but if you want to return each user when value is -1 you can do this https://jsfiddle.net/y322s88e/1/ – Nenad Vracar Jul 04 '16 at 12:04
Hold on, I'm going to post a new question. – swagster Jul 04 '16 at 12:05
If you want to end loop at first -1 and return that user then better option is to use find like this https://jsfiddle.net/y322s88e/3/ – Nenad Vracar Jul 04 '16 at 12:06

score 1 · Answer 2 · answered Jul 04 '16 at 11:49

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 04 '16 at 11:49

Nageshwar Reddy Pandem

1,059
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How to modify each JSON object javascript

2 Answers2

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