Accessing dynamic values from JSON object in javascript

Question

this is my json object. i need to get only all the values of packageName and assign it to an array. can any body help me with that. i can not go for using indexes since this is dynamic object.
thanks in advance.

var data = [
    {
        "packageName":"string",
        "packageValue":"string"
    },
    {
        "packageName":"string",
        "packageValue":"string"
    }
]

Answer 1

Use javascript map function

var packageNames = data.map(function(obj){
   return obj.packageName;
})

 var data=[ { "packageName":"string1", "packageValue":"string" }, { "packageName":"string2", "packageValue":"string" } ] var packageNames = data.map(function(obj){ return obj.packageName; }) console.log(packageNames) 

Answer 2

You can use filter function and add to array only when this key exists.

var arr = [];

data.filter(getValue)

function getValue(data){
 if(data[packageName]){
   arr.push(data[packageName])
  }
}

Answer 3

You can add an if statement to check the key and then push it to an array.

for(var i = 0; i< data.length; i++){
    for (var property in data[i]) {
        if (data[i].hasOwnProperty(property)) {
            console.log(property);
            console.log(data[i][property]);
        }
    }
}