underscore.js with strings and other mixins (a node.js module)

undermix.coffee

define (require, exports, module) ->
  _ =     require("underscore")
  _.mixin require("underscore.string")
  _.mixin

    # Converts the arguments list to an Array
    aToArr: (list) ->
      if _.isArguments(list)
        _.toArray(list).slice(0)
      else
        console.log "aToArr called with these non-arguments: #{list}"
        [list]

    # Merges all from a list of objects in return for a single one
    # sequentially overwrites keys (with disrespect for nested values)
    allFurther: (into, rest...) ->
      # _.each rest, (item) -> _.map item, (val, key) -> into[key] = val
      for item in rest
        for key, val of item
          into[key] = val
      into

  module.exports = _

undermix.js

var __slice = Array.prototype.slice;
define(function(require, exports, module) {
  var _;
  _ = require("underscore");
  _.mixin(require("underscore.string"));
  _.mixin({
    aToArr: function(list) {
      if (_.isArguments(list)) {
        return _.toArray(list).slice(0);
      } else {
        console.log("aToArr called with these non-arguments: " + list);
        return [list];
      }
    },
    allFurther: function() {
      var into, item, key, rest, val, _i, _len;
      into = arguments[0], rest = 2 <= arguments.length ? __slice.call(arguments, 1) : [];
      for (_i = 0, _len = rest.length; _i < _len; _i++) {
        item = rest[_i];
        for (key in item) {
          val = item[key];
          into[key] = val;
        }
      }
      return into;
    }
  });
  return module.exports = _;
});