Function hasArrayNature

transformjs/react/example/index.js:10699–10719

* Perform a heuristic test to determine if an object is "array-like". * * A monk asked Joshu, a Zen master, "Has a dog Buddha nature?" * Joshu replied: "Mu." * * This function determines if its argument has "array nature": it returns * true if the argument is an actual array, an `arg

(obj)

	 * @return {boolean}
	 */
	function hasArrayNature(obj) {
	  return (
	    // not null/false
	    !!obj && (
	    // arrays are objects, NodeLists are functions in Safari
	    typeof obj == 'object' || typeof obj == 'function') &&
	    // quacks like an array
	    'length' in obj &&
	    // not window
	    !('setInterval' in obj) &&
	    // no DOM node should be considered an array-like
	    // a 'select' element has 'length' and 'item' properties on IE8
	    typeof obj.nodeType != 'number' && (
	    // a real array
	    Array.isArray(obj) ||
	    // arguments
	    'callee' in obj ||
	    // HTMLCollection/NodeList
	    'item' in obj)
	  );
	}

	/**
	 * Ensure that the argument is an array by wrapping it in an array if it is not.