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@@ -0,0 +1,80 @@
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+function taskMakeProfileTimer() {
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+ function makeProfileTimer() {
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+ let startTime = performance.now();
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+
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+ function calc() {
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+ let endTime = performance.now();
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+ let result = endTime - startTime;
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+ return result
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+ }
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+ return calc;
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+ }
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+
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+ let timer = makeProfileTimer()
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+ alert('Время выполнения');
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+ alert(timer());
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+}
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+// taskMakeProfileTimer()
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+
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+
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+function taskMakeSaver() {
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+ function makeSaver(fn) {
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+ let result;
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+ let doFunc = true;
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+
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+ return function () {
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+ if (doFunc) {
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+ result = fn();
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+ doFunc = false;
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+ }
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+ return result;
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+ }
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+ }
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+ let nameSaver = makeSaver(() => prompt('Введите свое имя!'))
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+ alert('Имя еще не спрашивали!')
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+ let name1 = nameSaver()
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+ alert('Только что спросили имя!')
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+ let name2 = nameSaver()
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+ alert("Второй раз спрашиваете?")
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+ alert("Привет , " + nameSaver() + (nameSaver() === nameSaver() ? ". Готово!" : 'Какой-то бред!'))
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+}
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+// taskMakeSaver()
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+
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+
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+function finalCountdown(i) {
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+ return setTimeout(function () {
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+ if (i === 0) {
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+ console.log('Поехали!')
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+ } else {
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+ console.log(i)
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+ return finalCountdown(--i)
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+ }
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+ }, 1000)
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+}
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+// finalCountdown(5)
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+
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+
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+function myBind(fn, 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 fn.call(context, ...newArray)
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+ }
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+}
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+
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+
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+let pow5 = myBind(Math.pow, Math, [undefined, 5])
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+let cube = myBind(Math.pow, Math, [undefined, 3])
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+pow5(2) // => 32,
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+cube(3) // => 27
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+
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+
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+let 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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+let zeroPrompt = myBind(prompt, window, [undefined, "0"])
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+let someNumber = zeroPrompt("Введите число")
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+
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+myBind((...params) => params.join(''), null, [undefined, 'b', undefined, undefined, 'e', 'f'])('a', 'c', 'd') === 'abcdef'
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