javascript - Rename the property names and change the values of multiple objects

Question

In the object below, I'd like to change the property name, thumb, to thumbnail. I'd also like to change the values of the title to include <span> tags.

Here's my object:

var data = [{
    thumb: '/images/01.png',
    title: 'My title',
},{
    thumb: '/images/02.png',
    title: 'My title',
},{
    thumb: '/images/03.png',
    title: 'My title',
}];

here's how I'd like it to look:

var data = [{
    thumbnail: '/images/01.png',
    title: '<span class="red">title 1</span>',
},{
    thumbnail: '/images/02.png',
    title: '<span class="red">title 2</span>',
},{
    thumbnail: '/images/03.png',
    title: '<span class="red">title 3</span>',
}];

Here's what I've tried which doesn't work:

 var i=0, count=data.length;
   for (i=0;i<=count;i++){
    data[i].thumbnail=data[i].thumb;
    data[i].title="<span class='red'>"+data[i].title+"<span>";
   }

Answer 1

This seems to do the trick:

function changeData(data){
    var title;
    for(var i = 0; i < data.length; i++){
        if(data[i].hasOwnProperty("thumb")){
            data[i]["thumbnail"] = data[i]["thumb"];
            delete data[i]["thumb"];
        }

        if(data[i].hasOwnProperty("title")){ //added missing closing parenthesis
            title = data[i].title;
            data[i].title = '<span class="red">' + title + '</span>';
        }
    }
}

changeData(data);

EDIT:

I tried to make the function generic, but since you updated your answer to do very specific things, I've added the business logic to the function.