Pass 1+ objects to bind all functions to it - creating a useful <this>

bindAll.js

// Problem: Callbacks are called with the window object as <this>
// Solution: Bind all functions to their object
// An implementation of http://underscorejs.org/#bindAll
// Demo -> http://codepen.io/KarlPokus/pen/Lkwqyj
function bindAll(x) {
  var wat = Object.prototype.toString;
  if (wat.call(x) === '[object Object]') {
    x = [x];
  }  
  if (wat.call(x) === '[object Array]') {
    x.forEach(function(o){
      for (var k in o) {
        if (typeof o[k] === 'function' && o.hasOwnProperty(k)) {
          o[k] = o[k].bind(o); // No need to return anything. Objects are passed by reference
        }
      }
    });
  }
}