Some basic utils. YMMV / not tested.

utils1.js

var utils = {
  lists: {
    firstOf: function firstOf(collection) {
      var keys = Object.keys(collection);
      return keys.length > 0 ? collection[keys[0]] : undefined;
    },
    valueForKey: function valueForKey(collection, key) {
      return collection[key];
    },
    valueForPath: function valueForPath(collection, pathOrKey) {
      var path = Array.isArray(pathOrKey) ? pathOrKey : [pathOrKey];
      var keys = path.slice();
      var value = collection;

      do {
        value = value[keys.shift()];
      } while (keys.length > 0 && value !== undefined);

      return value;
    },
  },
  funcs: {
    // returns a new function with any additional arguments partially applied to `func`.
    // example: var add2 = funcs.partial(function add(x, y) { return x + y }, 2);
    // signature: ((Prefix..., Suffix...) => Any, Prefix...) => ((Suffix...) => Any)
    partial: function partial(func) {
      var prefix = Array.prototype.slice.call(arguments, 1);
      return function () {
        var suffix = Array.prototype.slice.call(arguments);
        return func.apply(null, [].concat(prefix, suffix));
      };
    },
  },
};