MatthewMueller's array working with leaflet.js

array.js

;(function(){


/**
 * hasOwnProperty.
 */

var has = Object.prototype.hasOwnProperty;

/**
 * Require the given path.
 *
 * @param {String} path
 * @return {Object} exports
 * @api public
 */

function require(path, parent, orig) {
  var resolved = require.resolve(path);

  // lookup failed
  if (null == resolved) {
    orig = orig || path;
    parent = parent || 'root';
    var err = new Error('Failed to require "' + orig + '" from "' + parent + '"');
    err.path = orig;
    err.parent = parent;
    err.require = true;
    throw err;
  }

  var module = require.modules[resolved];

  // perform real require()
  // by invoking the module's
  // registered function
  if (!module.exports) {
    module.exports = {};
    module.client = module.component = true;
    module.call(this, module.exports, require.relative(resolved), module);
  }

  return module.exports;
}

/**
 * Registered modules.
 */

require.modules = {};

/**
 * Registered aliases.
 */

require.aliases = {};

/**
 * Resolve `path`.
 *
 * Lookup:
 *
 *   - PATH/index.js
 *   - PATH.js
 *   - PATH
 *
 * @param {String} path
 * @return {String} path or null
 * @api private
 */

require.resolve = function(path) {
  if (path.charAt(0) === '/') path = path.slice(1);
  var index = path + '/index.js';

  var paths = [
    path,
    path + '.js',
    path + '.json',
    path + '/index.js',
    path + '/index.json'
  ];

  for (var i = 0; i < paths.length; i++) {
    var path = paths[i];
    if (has.call(require.modules, path)) return path;
  }

  if (has.call(require.aliases, index)) {
    return require.aliases[index];
  }
};

/**
 * Normalize `path` relative to the current path.
 *
 * @param {String} curr
 * @param {String} path
 * @return {String}
 * @api private
 */

require.normalize = function(curr, path) {
  var segs = [];

  if ('.' != path.charAt(0)) return path;

  curr = curr.split('/');
  path = path.split('/');

  for (var i = 0; i < path.length; ++i) {
    if ('..' == path[i]) {
      curr.pop();
    } else if ('.' != path[i] && '' != path[i]) {
      segs.push(path[i]);
    }
  }

  return curr.concat(segs).join('/');
};

/**
 * Register module at `path` with callback `definition`.
 *
 * @param {String} path
 * @param {Function} definition
 * @api private
 */

require.register = function(path, definition) {
  require.modules[path] = definition;
};

/**
 * Alias a module definition.
 *
 * @param {String} from
 * @param {String} to
 * @api private
 */

require.alias = function(from, to) {
  if (!has.call(require.modules, from)) {
    throw new Error('Failed to alias "' + from + '", it does not exist');
  }
  require.aliases[to] = from;
};

/**
 * Return a require function relative to the `parent` path.
 *
 * @param {String} parent
 * @return {Function}
 * @api private
 */

require.relative = function(parent) {
  var p = require.normalize(parent, '..');

  /**
   * lastIndexOf helper.
   */

  function lastIndexOf(arr, obj) {
    var i = arr.length;
    while (i--) {
      if (arr[i] === obj) return i;
    }
    return -1;
  }

  /**
   * The relative require() itself.
   */

  function localRequire(path) {
    var resolved = localRequire.resolve(path);
    return require(resolved, parent, path);
  }

  /**
   * Resolve relative to the parent.
   */

  localRequire.resolve = function(path) {
    var c = path.charAt(0);
    if ('/' == c) return path.slice(1);
    if ('.' == c) return require.normalize(p, path);

    // resolve deps by returning
    // the dep in the nearest "deps"
    // directory
    var segs = parent.split('/');
    var i = lastIndexOf(segs, 'deps') + 1;
    if (!i) i = 0;
    path = segs.slice(0, i + 1).join('/') + '/deps/' + path;
    return path;
  };

  /**
   * Check if module is defined at `path`.
   */

  localRequire.exists = function(path) {
    return has.call(require.modules, localRequire.resolve(path));
  };

  return localRequire;
};
require.register("component-emitter/index.js", function(exports, require, module){

/**
 * Expose `Emitter`.
 */

module.exports = Emitter;

/**
 * Initialize a new `Emitter`.
 *
 * @api public
 */

function Emitter(obj) {
  if (obj) return mixin(obj);
};

/**
 * Mixin the emitter properties.
 *
 * @param {Object} obj
 * @return {Object}
 * @api private
 */

function mixin(obj) {
  for (var key in Emitter.prototype) {
    obj[key] = Emitter.prototype[key];
  }
  return obj;
}

/**
 * Listen on the given `event` with `fn`.
 *
 * @param {String} event
 * @param {Function} fn
 * @return {Emitter}
 * @api public
 */

Emitter.prototype.on = function(event, fn){
  this._callbacks = this._callbacks || {};
  (this._callbacks[event] = this._callbacks[event] || [])
    .push(fn);
  return this;
};

/**
 * Adds an `event` listener that will be invoked a single
 * time then automatically removed.
 *
 * @param {String} event
 * @param {Function} fn
 * @return {Emitter}
 * @api public
 */

Emitter.prototype.once = function(event, fn){
  var self = this;
  this._callbacks = this._callbacks || {};

  function on() {
    self.off(event, on);
    fn.apply(this, arguments);
  }

  fn._off = on;
  this.on(event, on);
  return this;
};

/**
 * Remove the given callback for `event` or all
 * registered callbacks.
 *
 * @param {String} event
 * @param {Function} fn
 * @return {Emitter}
 * @api public
 */

Emitter.prototype.off =
Emitter.prototype.removeListener =
Emitter.prototype.removeAllListeners = function(event, fn){
  this._callbacks = this._callbacks || {};
  var callbacks = this._callbacks[event];
  if (!callbacks) return this;

  // remove all handlers
  if (1 == arguments.length) {
    delete this._callbacks[event];
    return this;
  }

  // remove specific handler
  var i = callbacks.indexOf(fn._off || fn);
  if (~i) callbacks.splice(i, 1);
  return this;
};

/**
 * Emit `event` with the given args.
 *
 * @param {String} event
 * @param {Mixed} ...
 * @return {Emitter}
 */

Emitter.prototype.emit = function(event){
  this._callbacks = this._callbacks || {};
  var args = [].slice.call(arguments, 1)
    , callbacks = this._callbacks[event];

  if (callbacks) {
    callbacks = callbacks.slice(0);
    for (var i = 0, len = callbacks.length; i < len; ++i) {
      callbacks[i].apply(this, args);
    }
  }

  return this;
};

/**
 * Return array of callbacks for `event`.
 *
 * @param {String} event
 * @return {Array}
 * @api public
 */

Emitter.prototype.listeners = function(event){
  this._callbacks = this._callbacks || {};
  return this._callbacks[event] || [];
};

/**
 * Check if this emitter has `event` handlers.
 *
 * @param {String} event
 * @return {Boolean}
 * @api public
 */

Emitter.prototype.hasListeners = function(event){
  return !! this.listeners(event).length;
};

});
require.register("component-to-function/index.js", function(exports, require, module){

/**
 * Expose `toFunction()`.
 */

module.exports = toFunction;

/**
 * Convert `obj` to a `Function`.
 *
 * @param {Mixed} obj
 * @return {Function}
 * @api private
 */

function toFunction(obj) {
  switch ({}.toString.call(obj)) {
    case '[object Object]':
      return objectToFunction(obj);
    case '[object Function]':
      return obj;
    case '[object String]':
      return stringToFunction(obj);
    case '[object RegExp]':
      return regexpToFunction(obj);
    default:
      return defaultToFunction(obj);
  }
}

/**
 * Default to strict equality.
 *
 * @param {Mixed} val
 * @return {Function}
 * @api private
 */

function defaultToFunction(val) {
  return function(obj){
    return val === obj;
  }
}

/**
 * Convert `re` to a function.
 *
 * @param {RegExp} re
 * @return {Function}
 * @api private
 */

function regexpToFunction(re) {
  return function(obj){
    return re.test(obj);
  }
}

/**
 * Convert property `str` to a function.
 *
 * @param {String} str
 * @return {Function}
 * @api private
 */

function stringToFunction(str) {
  // immediate such as "> 20"
  if (/^ *\W+/.test(str)) return new Function('_', 'return _ ' + str);

  // properties such as "name.first" or "age > 18"
  return new Function('_', 'return _.' + str);
}

/**
 * Convert `object` to a function.
 *
 * @param {Object} object
 * @return {Function}
 * @api private
 */

function objectToFunction(obj) {
  var match = {}
  for (var key in obj) {
    match[key] = typeof obj[key] === 'string'
      ? defaultToFunction(obj[key])
      : toFunction(obj[key])
  }
  return function(val){
    if (typeof val !== 'object') return false;
    for (var key in match) {
      if (!(key in val)) return false;
      if (!match[key](val[key])) return false;
    }
    return true;
  }
}

});
require.register("array/index.js", function(exports, require, module){
module.exports = require('./lib/array');

});
require.register("array/lib/array.js", function(exports, require, module){
/**
 * Module dependencies
 */

var Emitter = require('emitter'),
    Enumerable = require('./enumerable'),
    proto = Array.prototype;

/*
 * Expose `array`
 */

module.exports = array;

// used to check argument to constructor, etc.
function isArray(obj) {
    return ((obj && obj.isArray === '[object Array]') || 
            (Object.prototype.toString.call(obj) === '[object Array]'));
}

/**
 * Initialize `array`
 */

function array() {
  var arr = null;
  if (arguments.length == 1 && isArray(arguments[0])) {
    arr = arguments[0];
  }
  else {
    arr = Array.prototype.slice.call(arguments);
  }
  if(!(this instanceof array)) return new array(arr);
  
  // array-like
  var len = this.length = arr.length;
  for(var i = 0; i < len; i++) {
    this[i] = arr[i];
  }
}

/**
 * Mixin `Emitter`
 */

Emitter(array.prototype);

/**
 * Mixin `Enumerable`
 */

Enumerable(array.prototype);

/**
 * add a marker that this object wants to be treated as an array by other libraries
 * (see https://github.com/dribnet/isArray.js)
 */

array.prototype.isArray = '[object Array]';

/**
 * Removes the last element from an array and returns that element
 *
 * @return {Mixed} removed element
 */

array.prototype.pop = function() {
  var ret = proto.pop.apply(this, arguments);
  this.emit('remove', ret);
  return ret;
};

/**
 * Push a value onto the end of the array,
 * returning the length of the array
 *
 * @param {Mixed, ...} elements
 * @return {Number}
 */

array.prototype.push = function() {
  var ret = proto.push.apply(this, arguments),
      args = [].slice.call(arguments);
  for(var i = 0, len = args.length; i < len; i++) this.emit('add', args[i]);
  return ret;
};

/**
 * Removes the first element from an array and returns that element.
 *
 * @return {Mixed}
 */

array.prototype.shift = function() {
  var ret = proto.shift.apply(this, arguments);
  this.emit('remove', ret);
  return ret;
};

/**
 * Adds and/or removes elements from an array.
 *
 * @param {Number} index
 * @param {Number} howMany
 * @param {Mixed, ...} elements
 * @return {Array} removed elements
 */

array.prototype.splice = function() {
  var ret = proto.splice.apply(this, arguments),
      added = [].slice.call(arguments, 2);
  for(var i = 0, len = ret.length; i < len; i++) this.emit('remove', ret[i]);
  for(    i = 0, len = added.length; i < len; i++) this.emit('add', added[i]);
  return ret;
};

/**
 * Adds one or more elements to the front of an array
 * and returns the new length of the array.
 *
 * @param {Mixed, ...} elements
 * @return {Number} length
 */

array.prototype.unshift = function() {
  var ret = proto.unshift.apply(this, arguments),
      args = [].slice.call(arguments);
  for(var i = 0, len = args.length; i < len; i++) this.emit('add', args[i]);
  return ret;
};

/**
 * toString
 */

array.prototype.toString =
array.prototype.toJSON   = function() {
  return proto.slice.call(this);
};

/**
 * Attach the rest of the array methods
 * 
 * TODO: implement lastIndexOf in ./lib/enumerable so it works in IE
 */

var methods = ['sort', 'reverse', 'concat', 'join', 'slice', 'lastIndexOf'];

methods.forEach(function(method) {
  array.prototype[method] = function() {
    return proto[method].apply(this, arguments);
  };
});

});
require.register("array/lib/enumerable.js", function(exports, require, module){
/**
 * Module Dependencies
 */

var toFunction = require('to-function'),
    proto = {};

/**
 * Mixin to `obj`.
 *
 *    var Enumerable = require('enumerable');
 *    Enumerable(Something.prototype);
 *
 * @param {Object} obj
 * @return {Object} obj
 */

module.exports = function(obj) {
  for(var key in proto) obj[key] = proto[key];
  return obj;
};

/**
 * Iterate each value and invoke `fn(val, i)`.
 *
 *    users.each(function(val, i){
 *
 *    })
 *
 * @param {Function} fn
 * @return {Object} self
 * @api public
 */

proto.forEach =
proto.each = function(fn){
  var arr = this,
      len = arr.length;

  for (var i = 0; i < len; i++) {
    fn(arr[i], i);
  }

  return this;
};

/**
 * Map each return value from `fn(val, i)`.
 *
 * Passing a callback function:
 *
 *    users.map(function(user){
 *      return user.name.first
 *    })
 *
 * Passing a property string:
 *
 *    users.map('name.first')
 *
 * @param {Function} fn
 * @return {Enumerable}
 * @api public
 */

proto.map = function(fn){
  fn = toFunction(fn);
  var arr = this,
      len = arr.length;

  for (var i = 0; i < len; ++i) {
    arr[i] = fn(arr[i], i);
  }

  return this;
};

/**
 * Select all values that return a truthy value of `fn(val, i)`.
 *
 *    users.select(function(user){
 *      return user.age > 20
 *    })
 *
 *  With a property:
 *
 *    items.select('complete')
 *
 * @param {Function|String} fn
 * @return {Enumerable}
 * @api public
 */

proto.filter =
proto.select = function(fn){
  fn = toFunction(fn);
  var out = [],
      arr = this,
      len = arr.length,
      val;

  for (var i = 0; i < len; ++i) {
    val = arr[i];
    if (fn(val, i)) out.push(val);
  }

  return new arr.constructor(out);
};

/**
 * Select all unique values.
 *
 *    nums.unique()
 *
 * @return {Enumerable}
 * @api public
 */

proto.unique = function(){
  var out = [],
      arr = this,
      len = arr.length,
      val;

  for (var i = 0; i < len; ++i) {
    val = arr[i];
    if (~arr.indexOf(val)) continue;
    out.push(val);
  }

  return new arr.constructor(out);
};

/**
 * Reject all values that return a truthy value of `fn(val, i)`.
 *
 * Rejecting using a callback:
 *
 *    users.reject(function(user){
 *      return user.age < 20
 *    })
 *
 * Rejecting with a property:
 *
 *    items.reject('complete')
 *
 * Rejecting values via `==`:
 *
 *    data.reject(null)
 *    users.reject(tobi)
 *
 * @param {Function|String|Mixed} fn
 * @return {Enumerable}
 * @api public
 */

proto.reject = function(fn){
  var out = [],
      arr = this,
      len = arr.length,
      val, i;

  if ('string' == typeof fn) fn = toFunction(fn);
  if (fn) {
    for (i = 0; i < len; ++i) {
      val = arr[i];
      if (!fn(arr[i], i)) out.push(val);
    }
  } else {
    for (i = 0; i < len; ++i) {
      val = arr[i];
      if (val != fn) out.push(val);
    }
  }

  return new arr.constructor(out);
};

/**
 * Reject `null` and `undefined`.
 *
 *    [1, null, 5, undefined].compact()
 *    // => [1,5]
 *
 * @return {Enumerable}
 * @api public
 */


proto.compact = function(){
  return this.reject(null);
};

/**
 * Return the first value when `fn(val, i)` is truthy,
 * otherwise return `undefined`.
 *
 *    users.find(function(user){
 *      return user.role == 'admin'
 *    })
 *
 * With a property string:
 *
 *    users.find('age > 20')
 *
 * @param {Function|String} fn
 * @return {Mixed}
 * @api public
 */

proto.find = function(fn){
  fn = toFunction(fn);
  var arr = this,
      len = arr.length,
      val;

  for (var i = 0; i < len; ++i) {
    val = arr[i];
    if (fn(val, i)) return val;
  }
};

/**
 * Return the last value when `fn(val, i)` is truthy,
 * otherwise return `undefined`.
 *
 *    users.findLast(function(user){
 *      return user.role == 'admin'
 *    })
 *
 * @param {Function} fn
 * @return {Mixed}
 * @api public
 */

proto.findLast = function (fn) {
    fn = toFunction(fn);
	var arr = this,
	i = arr.length;

	while(i--) if (fn(arr[i], i)) return arr[i];
};

/**
 * Assert that all invocations of `fn(val, i)` are truthy.
 *
 * For example ensuring that all pets are ferrets:
 *
 *    pets.all(function(pet){
 *      return pet.species == 'ferret'
 *    })
 *
 *    users.all('admin')
 *
 * @param {Function|String} fn
 * @return {Boolean}
 * @api public
 */

proto.every = function(fn){
  fn = toFunction(fn);
  var arr = this,
      len = arr.length,
      val;

  for (var i = 0; i < len; ++i) {
    val = arr[i];
    if (!fn(val, i)) return false;
  }

  return true;
};

/**
 * Assert that none of the invocations of `fn(val, i)` are truthy.
 *
 * For example ensuring that no pets are admins:
 *
 *    pets.none(function(p){ return p.admin })
 *    pets.none('admin')
 *
 * @param {Function|String} fn
 * @return {Boolean}
 * @api public
 */

proto.none = function(fn){
  fn = toFunction(fn);
  var arr = this,
      len = arr.length,
      val;

  for (var i = 0; i < len; ++i) {
    val = arr[i];
    if (fn(val, i)) return false;
  }
  return true;
};

/**
 * Assert that at least one invocation of `fn(val, i)` is truthy.
 *
 * For example checking to see if any pets are ferrets:
 *
 *    pets.any(function(pet){
 *      return pet.species == 'ferret'
 *    })
 *
 * @param {Function} fn
 * @return {Boolean}
 * @api public
 */

proto.any = function(fn){
  fn = toFunction(fn);
  var arr = this,
      len = arr.length,
      val;

  for (var i = 0; i < len; ++i) {
    val = arr[i];
    if (fn(val, i)) return true;
  }
  return false;
};

/**
 * Count the number of times `fn(val, i)` returns true.
 *
 *    var n = pets.count(function(pet){
 *      return pet.species == 'ferret'
 *    })
 *
 * @param {Function} fn
 * @return {Number}
 * @api public
 */

proto.count = function(fn){
  fn = toFunction(fn);
  var n = 0,
      arr = this,
      len = arr.length,
      val;

  if(!fn) return len;

  for (var i = 0; i < len; ++i) {
    val = arr[i];
    if (fn(val, i)) ++n;
  }
  return n;
};

/**
 * Determine the indexof `obj` or return `-1`.
 *
 * @param {Mixed} obj
 * @return {Number}
 * @api public
 */

proto.indexOf = function(obj) {
  var arr = this,
      len = arr.length,
      val;

  for (var i = 0; i < len; ++i) {
    val = arr[i];
    if (val === obj) return i;
  }

  return -1;
};

/**
 * Check if `obj` is present in this enumerable.
 *
 * @param {Mixed} obj
 * @return {Boolean}
 * @api public
 */

proto.has = function(obj) {
  return !! ~this.indexOf(obj);
};

/**
 * Reduce with `fn(accumulator, val, i)` using
 * optional `init` value defaulting to the first
 * enumerable value.
 *
 * @param {Function} fn
 * @param {Mixed} [val]
 * @return {Mixed}
 * @api public
 */

proto.reduce = function(fn, init){
  var arr = this,
      len = arr.length,
      i = 0,
      val;

  val = null == init
    ? arr.get(i++)
    : init;

  for (; i < len; ++i) {
    val = fn(val, arr[i], i);
  }

  return val;
};


/**
 * Determine the max value.
 *
 * With a callback function:
 *
 *    pets.max(function(pet){
 *      return pet.age
 *    })
 *
 * With property strings:
 *
 *    pets.max('age')
 *
 * With immediate values:
 *
 *    nums.max()
 *
 * @param {Function|String} fn
 * @return {Number}
 * @api public
 */

proto.max = function(fn){
  var arr = this,
      len = arr.length,
      max = -Infinity,
      n = 0,
      val, i;

  if (fn) {
    fn = toFunction(fn);
    for (i = 0; i < len; ++i) {
      n = fn(arr[i], i);
      max = n > max ? n : max;
    }
  } else {
    for (i = 0; i < len; ++i) {
      n = arr[i];
      max = n > max ? n : max;
    }
  }

  return max;
};

/**
 * Determine the min value.
 *
 * With a callback function:
 *
 *    pets.min(function(pet){
 *      return pet.age
 *    })
 *
 * With property strings:
 *
 *    pets.min('age')
 *
 * With immediate values:
 *
 *    nums.min()
 *
 * @param {Function|String} fn
 * @return {Number}
 * @api public
 */

proto.min = function(fn){
  var arr = this,
      len = arr.length,
      min = Infinity,
      n = 0,
      val, i;

  if (fn) {
    fn = toFunction(fn);
    for (i = 0; i < len; ++i) {
      n = fn(arr[i], i);
      min = n < min ? n : min;
    }
  } else {
    for (i = 0; i < len; ++i) {
      n = arr[i];
      min = n < min ? n : min;
    }
  }

  return min;
};

/**
 * Determine the sum.
 *
 * With a callback function:
 *
 *    pets.sum(function(pet){
 *      return pet.age
 *    })
 *
 * With property strings:
 *
 *    pets.sum('age')
 *
 * With immediate values:
 *
 *    nums.sum()
 *
 * @param {Function|String} fn
 * @return {Number}
 * @api public
 */

proto.sum = function(fn){
  var arr = this,
      len = arr.length,
      n = 0,
      val, i;

  if (fn) {
    fn = toFunction(fn);
    for (i = 0; i < len; ++i) {
      n += fn(arr[i], i);
    }
  } else {
    for (i = 0; i < len; ++i) {
      n += arr[i];
    }
  }

  return n;
};

/**
 * Determine the average value.
 *
 * With a callback function:
 *
 *    pets.avg(function(pet){
 *      return pet.age
 *    })
 *
 * With property strings:
 *
 *    pets.avg('age')
 *
 * With immediate values:
 *
 *    nums.avg()
 *
 * @param {Function|String} fn
 * @return {Number}
 * @api public
 */

proto.avg =
proto.mean = function(fn){
  var arr = this,
      len = arr.length,
      n = 0,
      val, i;

  if (fn) {
    fn = toFunction(fn);
    for (i = 0; i < len; ++i) {
      n += fn(arr[i], i);
    }
  } else {
    for (i = 0; i < len; ++i) {
      n += arr[i];
    }
  }

  return n / len;
};

/**
 * Return the first value, or first `n` values.
 *
 * @param {Number|Function} [n]
 * @return {Array|Mixed}
 * @api public
 */

proto.first = function(n) {
  var arr = this;

  if(!n) return arr[0];
  else if ('number' !== typeof n) return this.find(n);

  var len = Math.min(n, arr.length),
      out = new Array(len);

  for (var i = 0; i < len; ++i) {
    out[i] = arr[i];
  }

  return out;

};

/**
 * Return the last value, or last `n` values.
 *
 * @param {Number|Function} [n]
 * @return {Array|Mixed}
 * @api public
 */

proto.last = function(n){
  var arr = this,
      len = arr.length;

  if(!n) return arr[len - 1];
  else if ('number' !== typeof n) return this.findLast(n);

  var i = Math.max(0, len - n),
      out = [];

  for (; i < len; ++i) {
    out.push(arr[i]);
  }

  return out;
};

});
require.alias("component-emitter/index.js", "array/deps/emitter/index.js");

require.alias("component-to-function/index.js", "array/deps/to-function/index.js");

if (typeof exports == "object") {
  module.exports = require("array");
} else if (typeof define == "function" && define.amd) {
  define(function(){ return require("array"); });
} else {
  window["array"] = require("array");
}})();

index.html

<!DOCTYPE html>
<html>
<head>
  <title>Leaflet Quick Start Guide Example</title>
  <meta charset="utf-8" />

  <meta name="viewport" content="width=device-width, initial-scale=1.0">

  <link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.5.1/leaflet.css" />
  <!--[if lte IE 8]><link rel="stylesheet" href="../dist/leaflet.ie.css" /><![endif]-->
</head>
<body>
  <div id="map" style="width: 960px; height: 500px"></div>

  <script src="isArray-polyfill.js"></script>
  <script src="array.js"></script>
  <script src="http://cdn.leafletjs.com/leaflet-0.5.1/leaflet.js"></script>
  <script>
    var centerPoint = array(51.505, -0.09);
    var circleCenter = array(51.508, -0.11);
    var polygonPoints = array(
      array(51.509, -0.08),
      array(51.503, -0.06),
      array(51.51, -0.047)
    );

    var map = L.map('map').setView(centerPoint, 13);

    L.tileLayer('http://{s}.tile.cloudmade.com/BC9A493B41014CAABB98F0471D759707/997/256/{z}/{x}/{y}.png', {
      maxZoom: 18,
      attribution: 'Map data &copy; <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, Imagery © <a href="http://cloudmade.com">CloudMade</a>'
    }).addTo(map);


    L.marker(centerPoint).addTo(map)
      .bindPopup("<b>Hello world!</b><br />I am a popup.").openPopup();

    L.circle(circleCenter, 500, {
      color: 'red',
      fillColor: '#f03',
      fillOpacity: 0.5
    }).addTo(map).bindPopup("I am a circle.");

    L.polygon(polygonPoints).addTo(map).bindPopup("I am a polygon.");


    var popup = L.popup();

    function onMapClick(e) {
      popup
        .setLatLng(e.latlng)
        .setContent("You clicked the map at " + e.latlng.toString())
        .openOn(map);
    }

    map.on('click', onMapClick);

  </script>
</body>
</html>

isArray-polyfill.js

/**
 * Provides isArray.js support for for libraries that verify an object
 * is an array via either Object.prototype.toString or Array.isArray.
 *
 * For more information: https://github.com/dribnet/isArray.js
 */

// this method patches (or implements) Array.isArray
// and stores the original function so it can be restored
(function(ar) {
  var isArray = ar.isArray;
  // toString is only used if Array.isArray does not exist
  var toString = Object.prototype.toString;
  ar["$originalToString"] = isArray;
  ar.isArray = function(obj) {
    var that = this;
    if(obj && obj.isArray === '[object Array]') {
      return true;
    }
    else if (isArray) {
      return isArray.call(that, obj);
    }
    else {
      // fallback - polyfill the Array.isArray method
      return toString.call(obj) === "[object Array]";
    }
  }
})(Array);

// this method patches Object.prototype.toString
// and stores the original function so it can be restored
(function(op) {
  var toString = op.toString;
  op["$originalToString"] = toString;
  op.toString = function(args) {
    var that = this;
    if(that && that.isArray === '[object Array]') {
      return '[object Array]';
    }
    else {
      return toString.call(that);
    }
  }
})(Object.prototype);