Question

var data = {};
data.event = [
{
    "id":"998",
    "title":"Foo",
    "thumb":"",
    "source":""
},
{
    "id":"999",
    "title":"Bar",
    "thumb":"",
    "source":""
}
]

Given that id=998 I need to extract the value of the “title” and I’m a bit lost as to the proper syntax.

Answer 1

You can iterate with $.each() and check to see if the ID matches, and then write the value of title to a variable.

var title;

$.each(data.event, function(i,e) {
    if (this.id==='998') {
        title=this.title;
        return false;
    }
});

FIDDLE