fancy object sort example

sort-example.js

var locations = {
  seattle: {reviews:[{title:"c"}]},
  portland: {reviews:[{title:"v"}]},
  provo: {reviews:[{title:"c"}]},
};

sort(locations).by("title").on("reviews");

function sort(obj) {
    sort.obj = obj;
    sort.by = function(field) {
        sort.field = field;
        return sort;
    }
    sort.on = function(arrayKey) {
        for (var i in sort.obj) {
             obj[i][arrayKey].sort(sortBy(sort.field));
        };
        return sort;
    }
    return sort;
}

function sortBy(field) {
    if (!sortBy.fields) sortBy.fields = {};
    if (sortBy.fields[field]) return sortBy.fields[field];
    sortBy.fields[field] = function(a, b) {
        a = a[field].toLowerCase()
        b = b[field].toLowerCase();
        if (a < b) return -1; 
        if (a > b) return 1;
        return 0;
    }
    return sortBy.fields[field];
}