js实现数组里边对象去重

		var arr2 = [
		  { name: "18845568888", psd: "1" },
		  { name: "19999999999", psd: "11" },
		  { name: "15325465456", psd: "12" },
		  { name: "18845568888", psd: "13" },
		  { name: "12355555555", psd: "1" },
		  { name: "18845568888", psd: "1" },
		  { name: "18954564654", psd: "12" }
		]
		function arrayUnique2(arr, name) {
		  var hash = {};
		  return arr.reduce(function (item, next) {
		    hash[next[name]] ? '' : hash[next[name]] = true && item.push(next);
		    return item;
		  }, []);
		}
		console.log(arr2);
		console.log(arrayUnique2(arr2, "name"));//根据key去重
		//console.log(arrayUnique2(arr2, "psd"));		var arr2 = [
		  { name: "18845568888", psd: