Deep Get in JavaScript

gistfile1.js

function deepGet (obj, properties) {
    // If we have reached an undefined/null property
    // then stop executing and return undefined.
    if (obj === undefined || obj === null) {
        return;
    }

    // If the path array has no more elements, we've reached
    // the intended property and return its value.
    if (properties.length === 0) {
        return obj;
    }

    // Prepare our found property and path array for recursion
    var foundSoFar = obj[properties[0]];
    var remainingProperties = properties.slice(1);

    return deepGet(foundSoFar, remainingProperties);
}