Dealing with function function signatures with multiple arguments.

prepend.js

// The usual way

var prepend = function (string, prefix) {
  return prefix.concat(string);
};

prepend("foo", "bar_"); // Wait, what? Is this "foobar_" or "bar_foo"? Not obvious without seeing the function signature.

// More natural language
var prepend = function (string) {
  return {
    with: function (prefix) {
      return prefix.concat(string);
    }
  };
};

prepend("foo").with("bar_"); // "bar_foo"