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@@ -0,0 +1,79 @@
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+//profiletimer
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+function makeProfileTimer() {
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+ let start = performance.now ()
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+ function finishOfTime () {
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+ let finish = performance.now()
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+ return (finish - start) / 1000;
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+ }
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+ return finishOfTime;
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+}
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+
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+var timer = makeProfileTimer()
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+alert('Замеряем время работы этого alert');
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+alert(timer())
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+
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+
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+//makesaver
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+function makeSaver (fn){
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+ let result;
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+ let somethingThatHelp = true ;
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+ return () => {
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+ if (somethingThatHelp){
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+ result = fn();
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+ }
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+ somethingThatHelp = false
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+ return result
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+ }
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+ }
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+
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+ let nameSaver = makeSaver(() => prompt('введите имя'))
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+ alert ('имя еще не спрашивали')
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+ let name1 = nameSaver()
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+ alert ('just ask name')
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+ let name2 = nameSaver()
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+ alert ("tho times ask?")
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+ alert ("hello , " + nameSaver() + (nameSaver() === nameSaver() ? ". done" : 'shit happens'))
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+
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+ //finalCountdouwn
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+ function finalCountdown() {
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+ let countdown = 5;
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+ function someFunction() {
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+ console.log(countdown--)
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+ }
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+ if (!countdown){
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+ clearTimeout(timer)
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+ }
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+ for (let i = 1; i <6; i++){
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+ let timer = setTimeout(someFunction , 1000*i)
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+ }
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+ }
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+
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+ finalCountdown()
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+
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+ //myBind
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+
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+ function myBind (funcn, context, arr) {
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+ return (...params) => {
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+ let indexParam = 0;
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+ let newArray = arr.map((i) => (i === undefined ? params[indexParam++] : i))
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+ return func.call(context, ...newArray)
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+ }
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+ }
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+
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+ var pow5 = myBind(Math.pow, Math, [undefined, 5])
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+ var cube = myBind(Math.pow, Math, [undefined, 3])
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+
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+ alert(pow5(2)) // => 32, вызывает Math.pow(2,5), соотнесите с [undefined, 5]
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+ alert (cube(3)) // => 27
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+
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+
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+ var chessMin = myBind(Math.min, Math, [undefined, 4, undefined, 5,undefined, 8,undefined, 9])
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+ chessMin(-1,-5,3,15) // вызывает Math.min(-1, 4, -5, 5, 3, 8, 15, 9), результат -5
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+
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+
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+
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+ var zeroPrompt = myBind(prompt, window, [undefined, "0"])
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+ var someNumber = zeroPrompt("Введите число") // вызывает prompt("Введите число","0")
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+
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+ console.log(myBind((...params) => params.join(''), null, [undefined, 'b', undefined, undefined, 'e', 'f'])('a','c','d') === 'abcdef')
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+
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Vadym Hlushko