CODEWITHSUNDEEP
javascriptjavascript-objects
deepak samuel
deepak samuel

Reputation: 23

javascript object - Dynamically setting a nested value using recursive function

I am trying to set one of the nested subobject properties, but the nested level is dynamic.

how can I dynamically set the nested properties?

It's working only one level properties,i can't set next inner level....

my code:

function deSerialize(qualifiedNameArray, currentIndex, resultJSON, valueToBeInitializedForFinalNode)
{
    if (currentIndex  == (qualifiedNameArray.length - 1)){
        resultJSON [qualifiedNameArray[currentIndex++]] = valueToBeInitializedForFinalNode;
    }
    else
    {
        resultJSON [qualifiedNameArray[currentIndex++]] = {};
    }

    if (currentIndex < qualifiedNameArray.length)
        deSerialize( qualifiedNameArray, currentIndex, resultJSON, valueToBeInitializedForFinalNode);

    return resultJSON;
}


  var results = {"columnname":"person.name.first", "varcharvalue":"david", "objecttype" : "user"};
    var valueToBeInitializedForFinalNode = results["varcharvalue"];
    var qualifiedNameArray = results["columnname"].split('.');
    var resultJSON = {};
    deSerialize(qualifiedNameArray, 0, resultJSON, valueToBeInitializedForFinalNode);

Upvotes: 2

Views: 1940

Answers (1)

mido
mido

Reputation: 25034

A simple solution might be, not sure if this is what you are looking for:

function makeObj(arry, initValue){
    var obj = {}, objRef  = obj, idx = 0;    
    while(idx < arry.length -1){
        obj[arry[idx]] = {};
        obj = obj[arry[idx]];
        idx++;
    }
    obj[arry[idx]] = initValue;
    return objRef;
}

usage:

resultJSON = makeObj( qualifiedNameArray, valueToBeInitializedForFinalNode);

another way is:

function makeObj(objRef, arry, initValue){
    var obj = objRef, idx = 0;    
    while(idx < arry.length -1){
        if(!obj[arry[idx]]) obj[arry[idx]] = {};
        obj = obj[arry[idx]];
        idx++;
    }
    if(!obj[arry[idx]]) obj[arry[idx]] = initValue;
}

this way, you do not change any values that might have been already present, usage:

makeObj( resultJSON, qualifiedNameArray, valueToBeInitializedForFinalNode);

Upvotes: 2

Related Questions