SortBy with deep object access

gistfile1.js

'use strict';

function deep(obj, prop) {
    var segs = prop.split('.');
    while (segs.length) {
        obj = obj[segs.shift()];
    }
    return obj;
}

module.exports = function(prop) {
    return function(item) {
        return deep(item, prop);
    };
};

// Usage:
var deep = require('deep'); // `deep` being the above

_.sortBy(arr, deep('some.nested.key'));