Conditionally Change A Json Property Based On A Json Label - Javascript

I have a JSON file which i load into my javascript var Before plotting my data: { 'Month': 'September', 'Value': 1681937, 'Year': 2013 }, { 'Month': 'April', 'V

Solution 1:

What about this ?

var my = [{
    "Month": "September",
    "Value": 1681937,
    "Year": 2013
}, {
    "Month": "April",
    "Value": 2138286,
    "Year": 2014
}];

console.log('my (before) :', my);

for(var i=0; i<my.length; i++) {
    my[i]["Value" + my[i].Year] = my[i].Value;
    deletemy[i]["Value"];
}

console.log('my (after) :', my);

See the console of the jsFiddle to choose the one you need:

Result will be :

[{"Month":"September","Value2013":1681937,"Year":2013},{"Month":"April","Value2014":2138286,"Year":2014}]

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EDIT : You can see the different common possibilites and their performance results here : http://jsperf.com/jquery-each-vs-underscore-each-vs-for-loops/18

Solution 2:

I reccomend using underscore to achieve this smoothly.

Given an array of objects

var myArray=[{
    "Month": "September",
    "Value": 1681937,
    "Year": 2013
},
{
    "Month": "April",
    "Value": 2138286,
    "Year": 2014
}];

Your replacement should be:

_.each(myArray,function(element) { 
    element['Value'+element.Year]=element.Value; 
    delete element.Value; 
});

Resulting array is

[{
    "Month": "September",
    "Value2013": 1681937,
    "Year": 2013
},
{
    "Month": "April",
    "Value2014": 2138286,
    "Year": 2014
}];