What is the best way to loop through arrays of objects within other arrays and delete specific attributes?

Question

What is the best way to loop through arrays of objects within other arrays and delete specific attributes?

I have an array of JavaScript objects with potential children who share the same type as their parent. These children can also have their own set of children. My goal is to loop through all nodes and modify certain values.

[
    {
        "text": "Auto",
        "icon": "/libs/jstree/folder.png",
        "state": {
            "opened": true,
            "selected": true
        }
    },
    ...

Within the given object, I aim to iterate through all nodes and delete the "state" attribute. How should I go about this process?

javascript

Answer 1

Answer №1

One way to remove states recursively is by checking both inside and outside.

Check out this recursive method here

function removeStateFromObject(obj){
    if (obj.hasOwnProperty('state')) delete obj['state'];
    if (obj instanceof Array) obj.forEach(removeStateFromObject);
    else if (obj instanceof Object) for (var key in obj) removeStateFromObject(obj[key]);                 
}

Answer 2

One way to remove states recursively is by checking both inside and outside.

Check out this recursive method here

function removeStateFromObject(obj){
    if (obj.hasOwnProperty('state')) delete obj['state'];
    if (obj instanceof Array) obj.forEach(removeStateFromObject);
    else if (obj instanceof Object) for (var key in obj) removeStateFromObject(obj[key]);                 
}

Answer 3

Answer №2

Check out this solution:

function eliminateKeys(data, targetKey) {
    data.forEach(function(item, idx) {
        delete item[targetKey];
        if (item.children !== undefined) {
            eliminateKeys(item.children, targetKey);
        }
    });
}

eliminateKeys(jsonData, "status");

Live example: http://jsfiddle.net/4dhJ5N68/

Answer 4

Check out this solution:

function eliminateKeys(data, targetKey) {
    data.forEach(function(item, idx) {
        delete item[targetKey];
        if (item.children !== undefined) {
            eliminateKeys(item.children, targetKey);
        }
    });
}

eliminateKeys(jsonData, "status");

Live example: http://jsfiddle.net/4dhJ5N68/

Answer 5

Answer №3

To effectively navigate through nested objects, it is crucial to employ a recursive function. Below is an example of a common approach to iterating over nested objects:

function traverse(obj){
    for(key in obj){
        console.log(obj[key]);
        if(typeof obj[key] === "object"){ 
            traverse(obj[key]); 
        }
    }
}

You can build upon this function to tailor it to your specific requirements. If you are utilizing JQuery, they offer the .each(function(index, item){}) method which serves a similar purpose.

If you need assistance with anything else, feel free to update your post or leave a comment below.

Answer 6

To effectively navigate through nested objects, it is crucial to employ a recursive function. Below is an example of a common approach to iterating over nested objects:

function traverse(obj){
    for(key in obj){
        console.log(obj[key]);
        if(typeof obj[key] === "object"){ 
            traverse(obj[key]); 
        }
    }
}

You can build upon this function to tailor it to your specific requirements. If you are utilizing JQuery, they offer the .each(function(index, item){}) method which serves a similar purpose.

If you need assistance with anything else, feel free to update your post or leave a comment below.

Answer 7

Answer №4

To achieve this in a different way, utilize the replacer parameter within the JSON.stringify function like so:

JSON.parse(JSON.stringify(object, ['text', 'icon', 'children']))

By providing a list of specific properties to include in the output, other properties such as state will be excluded from the result. More information can be found in this example with an array.

Answer 8

To achieve this in a different way, utilize the replacer parameter within the JSON.stringify function like so:

JSON.parse(JSON.stringify(object, ['text', 'icon', 'children']))

By providing a list of specific properties to include in the output, other properties such as state will be excluded from the result. More information can be found in this example with an array.

Answer 9

Answer №5

Why not give this a shot:

jQuery.each(myJSONObject, function(i, val) {
    delete val.state;
});

Check out the Fiddle here

Update available:

Here's another solution that requires a temporary variable.

var tempJsonObject = [];
jQuery.each(myJSONObject, function(i, val) {
    delete val.state;
    tempJsonObject[i] = val;
});

myJSONObject = tempJsonObject;

See the updated Fiddle here

Update:

This update includes removing the state property from child objects as well.

removeProperty(myJSONObject, "state");

function removeProperty(myJSONObject, prop) {
    jQuery.each(myJSONObject, function(i, val) {
        delete val.state;

        if(val.hasOwnProperty("children")) {
          removeProperty(val.children, "state");
        }
    });
}

View the latest version of the Fiddle here

Answer 10

Why not give this a shot:

jQuery.each(myJSONObject, function(i, val) {
    delete val.state;
});

Check out the Fiddle here

Update available:

Here's another solution that requires a temporary variable.

var tempJsonObject = [];
jQuery.each(myJSONObject, function(i, val) {
    delete val.state;
    tempJsonObject[i] = val;
});

myJSONObject = tempJsonObject;

See the updated Fiddle here

Update:

This update includes removing the state property from child objects as well.

removeProperty(myJSONObject, "state");

function removeProperty(myJSONObject, prop) {
    jQuery.each(myJSONObject, function(i, val) {
        delete val.state;

        if(val.hasOwnProperty("children")) {
          removeProperty(val.children, "state");
        }
    });
}

View the latest version of the Fiddle here

Answer 11

Answer №6

let parsedJSON = JSON.parse(data);
for (let key in parsedJSON) {
   console.log(parsedJSON[key].content);
   parsedJSON[key].content = "updated text"
   let innerData = parsedJSON[key].children
   for (let j in innerData) {
       console.log(innerData[j].content);
       innerData[j].content = "new text for all inner elements"
   }
};

Answer 12

let parsedJSON = JSON.parse(data);
for (let key in parsedJSON) {
   console.log(parsedJSON[key].content);
   parsedJSON[key].content = "updated text"
   let innerData = parsedJSON[key].children
   for (let j in innerData) {
       console.log(innerData[j].content);
       innerData[j].content = "new text for all inner elements"
   }
};

What is the best way to loop through arrays of objects within other arrays and delete specific attributes?

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

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