Working with JSON

Often, on a callback that receives json, you may be tempted to do something such as:

if (data.image.length) {
    // Group of images
    for (var i = 0; i < data.image.length; i++) {
        debug("Image " + data.image[i].imageUrl + ": " + data.image[i].statusText);
    }
}
else {
    // Just a single image
    debug("Image " + data.image.imageUrl + ": " + data.image.statusText);
}

but it can be expressed more succinctly as:

if (!data.image.length) data.image = [data.image];
// Group of images
for (var i = 0; i < data.image.length; i++) {
    debug("Image " + data.image[i].imageUrl + ": " + data.image[i].statusText);
}