Perhaps the title is a bit basic. Essentially, I am looking for something similar to mysqldump ... --no-data .... For instance, I have a JSON object structured like this:
{ "key1" : "value1",
"key2" : "value2",
"key3" : {
"key3a" : 1,
"key3b" : 2
},
"key4" : "value3"
}
What I am aiming for is an empty object with the identical structure, such as:
{ "key1" : null,
"key2" : null,
"key3" : {
"key3a" : null,
"key3b" : null
},
"key4" : null
}
If you're looking for a way to create a deep copy of an object but return null for non-object values, you're essentially trying to perform a form of "deep cloning". One way to achieve this is by using a recursive function:
function deepAutumnClone(obj){
if (typeof obj !== 'object') return null;
var clone = {};
for (var key in obj) {
clone[key] = deepAutumnClone(obj[key]);
}
return clone;
}
To use the function, you would call it like this:
var originalObj = { "key1" : "value1",
"key2" : "value2",
"key3" : {
"key3a" : 1,
"key3b" : 2
},
"key4" : "value3"
};
console.log(deepAutumnClone(originalObj));
Keep in mind that the function may need adjustments depending on how you want to handle arrays or other non-object values.
Lastly, it's worth noting that the term "JSON object" is a misnomer in this case, as JSON refers to a text-based data interchange format, whereas what you have here is a standard JavaScript object.
Here is a unique function that supports resetting Arrays as well as Objects without setting inherited properties to null:
function duplicateAndReset(input) {
var result = null;
if (input instanceof Array) {
result = [];
for (var index = 0; index < input.length; index++) {
result[index] = duplicateAndReset(input[index]);
}
return result;
}
if (input instanceof Object) {
result = {};
for (property in input) {
if (input.hasOwnProperty(property)) {
result[property] = duplicateAndReset(input[property]);
}
}
}
return result;
}
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