Vladislav_Postnikov
/
HomeWork1


			
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							<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>Замыкание</title>
</head>
<body>

	<script>
	
//---------makeProfileTimer
		/*function makeProfileTimer(){
			let time1=performance.now();
			return function(){
				let time2=performance.now();
				alert(time2-time1);
			}
		}

		function fib(n){
			if(n==1||n==2){
				return 1;
			}else{
				return fib(n-1)+fib(n-2);
			}
		}
		
		var timer=makeProfileTimer();
		alert(fib(10));
		timer();*/

//-----------makeSaver
		function makeSaver(fn){
			let x=fn();
			return function(){
				return x;
			}
		}

		var saver = makeSaver(Math.random);
		var value1 = saver();
		var value2 = saver();
		console.log(value1+" "+value2);
		console.log(value1 === value2);

		var saver2 = makeSaver(() => console.log('saved function called') || [null, undefined, false, '', 0, Math.random()][Math.ceil(Math.random()*6)]);
		
		var value3 = saver2();
    	var value4 = saver2();
    	console.log(value3 === value4);

    	let namePrompt = prompt.bind(window, 'Как тебя зовут?')
    	let nameSaver = makeSaver(namePrompt)
    	alert(`Привет! Prompt еще не было!`)
    	alert(`Привет ${nameSaver()}. Только что запустился prompt, первый и последний раз`)
    	alert(`Слушай, ${nameSaver()}, го пить пиво. Ведь prompt был только один раз`)

//-----------Final Countdown
		/*(function count(){
			let x=5;
			let y=setInterval(function(){
				console.log(x);
				if(x==1){
					console.log('поехали');
					clearInterval(y);
				}
				x--;
			},1000)
		})();*/

//------------myBind
		/*function myBind(fn,context,args){
			return function(){
				let args2=Object.assign(args,arguments);
				return fn.call(context,...args2);
			}
		}

		var pow5 = myBind(Math.pow, Math, [undefined, 5]);
		var cube = myBind(Math.pow, Math, [undefined, 3]);
		console.log(pow5(2));   //32
		console.log(cube(3));   //27

		var chessMin = myBind(Math.min, Math, [undefined, 4, undefined, 5,undefined, 8,undefined, 9]);
		console.log(chessMin(-1,-5,3,15)); //NaN ???

		var zeroPrompt = myBind(prompt, window, [undefined, "0"]);

		var someNumber = zeroPrompt("Введите число");
		console.log(someNumber);


		console.log(myBind((...params) => params.join(''), null, [undefined, 'b', undefined, undefined, 'e', 'f'])('a','c','d') === 'abcdef');*/
	</script>
</body>
</html>