diff --git a/index.html b/index.html
index 3eb4344..efae204 100644
--- a/index.html
+++ b/index.html
@@ -1,7 +1,7 @@
 <!doctype html>
 <html>
 	<head>
-		<title>Base template</title>
+		<title>Lecture_7</title>
 		<link type="text/css" rel="stylesheet" media="all" href="http://github.com/css/main.css" />
 		<script src="http://github.com/js/main.js"></script>
 	</head>
@@ -9,7 +9,7 @@
 		<!-- This is base template for testing -->
 		<h1 class="mainTitle">
 			<img class="logo" src="http://github.com/images/logo.png" alt=""/>
-			<span class="text">Base template</span>
+			<span class="text">Lecture_7</span>
 		</h1>
 	</body>
 </html>
\ No newline at end of file
diff --git a/js/main.js b/js/main.js
index e69de29..f117e07 100644
--- a/js/main.js
+++ b/js/main.js
@@ -0,0 +1,322 @@
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+// object.key=undefined;
+
+// if(object.key1!==undefined){
+	// console.log("no resalt");
+// }
+// if("key1" in object){
+	// console.log("has resalt");
+// }
+// for(var key in object){
+	// console.log(object[key]);
+// }
+
+// var obj={
+	// "1":"value1",
+	// "25":"value2",
+	// "10":"value3",
+	// "test1":"value4",
+	// "asd":"value5",
+	// "15":"value6"
+// }
+// for(var key in obj){
+	// console.log(key);
+// }
+
+// var keys=Object.keys(obj);
+// console.log(keys);
+
+// for(var i=0;i<keys.length;i++){
+	// console.log(keys[i], obj[keys[i]]);
+// }
+
+var object={
+	"key1":10,
+	"key2":15
+}
+// Object.defineProperty(object,"key1",{
+	// writable:false
+// })
+
+// object.key1=25;
+// console.log(object.key1);
+
+// Object.defineProperty(object,"key1",{
+	// writable:true
+// })
+
+// object.key1=25;
+// console.log(object.key1);
+
+// Object.defineProperty(object,"key1",{
+	// configurable:false,
+	// writable:false,
+	// enumerable:false
+// });
+
+// console.log(Object.keys(object));
+// object.key1="test";
+// console.log(object.key1);
+
+// Object.defineProperty(object,"key1",{
+	// enumerable:true
+// });
+
+// Object.defineProperty(object,"test",{
+	// enumerable:true
+// });
+
+// console.log(object.test);
+
+// Object.defineProperty(object,"test",{
+	
+	// get:function(){return this.value /3},
+	// set:function(newValue){this.value=newValue*2}
+// });
+// console.log(object.test);
+// object.test=10;
+// console.log(object.test);
+
+var object={
+	firstName:"test",
+	lastName:"test2"
+}
+// Object.defineProperty(object,"fullname",{
+// get:function(){
+	// return this.firstName+" "+this.lastName;
+// },
+// set:function(newValue){
+	// this.firstName=newValue.split(" ")[0];
+	// this.lastName=newValue.split(" ")[1];
+// }
+// });
+
+// console.log(object.fullname);
+// object.fullname="Vasya Pupkin";
+// console.log(object.fullname);
+// console.log(object);
+// object.firstName="Sidor";
+// console.log(object.fullname);
+
+// Object.defineProperties(object,{
+	// "fullname":{
+		// get:function(){
+			// return this.firstName+" "+this.lastName;
+		// },
+		// set:function(newValue){
+			// this.firstName=newValue.split(" ")[0];
+			// this.lastName=newValue.split(" ")[1];
+		// }
+	// },
+	// "age":{
+		// value:18,
+		// enumerable:true,
+		// writable:false
+	// }
+// })
+
+// console.log(object.fullname);
+// console.log(object.age);
+
+// var array=[0,1];
+// console.log(array.push(10));//3
+// console.log(array);//[0,1,10]
+
+// console.log(array.pop());//10
+// console.log(array);//[0,1]
+
+// console.log(array.unshift(256));//3
+// console.log(array);//[256,0,1]
+
+// console.log(array.shift());//256
+// console.log(array);//[0,1]
+
+// var array=[0,1,2,3];
+// array.splice(1,2,5,6,7,8);//[1,2]
+// console.log(array);//[0,5,6,7,8,3]
+// console.log(array.splice(1,0,"test"));
+// console.log(array);//[0,"test",5,6,7,8,3]
+
+// var string="ab,bc,cd";
+// console.log(string.split(",",2));//["ab","bc"]
+
+// var url="http://google.com/mail";
+// var urlArray=url.split("/");
+// console.log(urlArray);
+// if(urlArray[urlArray.length-1]==="mail"){
+	// console.log("We are on email");
+// }
+
+// var objectString="test:value,test2:value2";
+// function stringToObject(string){
+	// var newObject={};
+	// var keysWithValues=string.split(",");
+	// for(var i=0;i<keysWithValues.length;i++){
+		// var keyAndValue=keysWithValues[i].split(":");
+		// newObject[keyAndValue[0]]=keyAndValue[1];
+	// }
+	// return newObject;
+// }
+
+// console.log(stringToObject(objectString));
+
+// var string="some string";
+// console.log(string.split(""));
+
+// var array=["ab","bc","cd"];
+// console.log(array.join());
+// console.log(array.join("|"));
+
+// console.log(["a","b","c","d"].slice(1,3));//["b","c"]
+// console.log(["a","b","c","d"].slice(1));//["b","c","d"]
+// console.log(["a","b","c","d"].slice(-3,-1));//["c","d"]
+
+// console.log([1,2,19].sort());//[1,19,2]
+
+// // var sortedArray=[1,2,15,10,9];
+// // sortedArray.sort(function(a,b){
+	// // if(a<b)
+		// // return -1;
+	// // if(a>b)
+		// // return 1;
+// // });
+// sortedArray.sort(function(a,b){
+	// return a-b;
+// });
+// console.log(sortedArray);
+
+// var sortedArray=["Art","BEst","rest","cmd"];
+// sortedArray.sort(function(string1,string2){
+	// if(string1.toLowerCase()>string2.toLowerCase())
+		// return 1;
+	// if (string1.toLowerCase()<string2.toLowerCase())
+		// return -1;
+// })
+// console.log(sortedArray);
+
+
+// var arr=[1,2,3];
+// arr.reverse();
+// console.log(arr);//[3,2,1]
+
+// var arr1=[1,2,3];
+// var arr2=[3,4,5];
+// var arr3=["test","rest","best"];
+// console.log(arr1.concat(arr2,{},null,arr3));
+
+// var object={
+	// "test":"rest"
+// };
+// var array=[1,"test",object];
+// console.log(array.indexOf(1));//0
+// console.log(array.indexOf("test"));//1
+// console.log(array.indexOf(object));//2
+// console.log(array.indexOf({"test":"rest"}));//-1
+// console.log(array.lastIndexOf(1));//3
+// if(~array.indexOf("test"))
+	// console.log("We have test in array");
+
+// var array=["test",2,25];
+// array.forEach(function(element,index,array){
+	// console.log(element,index,array);
+	// if(typeof element==="number")
+		// array[index]=element.toString();
+	// console.log(element,index,array);
+// })
+
+// var array=["test",2,25];
+// var arrayOfNumbers=array.filter(function(element,index,array){
+	// return typeof element==="number";
+// })
+// console.log(arrayOfNumbers);
+
+// var array=[1,2,3,4,5];
+// var newArray=array.map(function(element,index,array){
+	// return element*10;
+// })
+// console.log(array);
+// console.log(newArray);
+
+// var array=[25,456,345,"string"];
+// var isAllNumbers=array.every(function(element){
+	// return typeof element==="number";
+// });
+// console.log(isAllNumbers);//false
+// array.pop();
+// var isAllNumbers=array.every(function(element){
+	// return typeof element==="number";
+// });
+// console.log(isAllNumbers);//true
+// var isArrayHasNull=array.some(function(element){
+	// return element=== null;
+// });
+// console.log(isArrayHasNull);
+// array.push(null);
+// var isArrayHasNull=array.some(function(element){
+	// return element=== null;
+// });
+// console.log(isArrayHasNull);
+
+var array=[1,2,3,4,5];
+
+var summOfNumbers=array.reduce(function(startValue,element,index,array){
+	return startValue+element;
+},0);
+console.log(summOfNumbers);
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