JSFiddle - React, Tailwind, and code Playground

JavaScript

var json = {
    "competition one": [
        {
            "date": "2015-05-20",
            "position": 37
        },
        {
            "date": "2015-05-21",
            "position": 22
        }
    ],
    "competition two": [
        {
            "date": "2015-05-20",
            "position": 29
        },
        {
        "date": "2015-05-21",
        "position": 19
        }
    ]
}

var keys = Object.keys(json);
for (var i = 0; i < keys.length; i++)
{
    var key = keys[i];
    console.log(key);   
}