// makeProfileTimerWrapp() function makeProfileTimerWrapp() { function makeProfileTimer() { return function () { return performance.now() } } let timer = makeProfileTimer() alert('Замеряем время работы этого alert') alert(timer()) } // makeSaverWrapp() function makeSaverWrapp() { function makeSaver(func) { let storage = null return function () { if (storage === null) { storage = func() return storage } else { return storage } } } let saver = makeSaver(Math.random) let value1 = saver() let value2 = saver() console.log(value1) console.log(value2) console.log(value1 === value2) let saver2 = makeSaver(() => console.log('saved function called') || [null, undefined, false, '', 0, Math.random()][Math.ceil(Math.random()*6)]) let value3 = saver2() let value4 = saver2() console.log(value3 === value4) } // finalCountdownWrapp() function finalCountdownWrapp() { let i = 0; (function loop() { setTimeout(function () { console.log(++i) loop() }, 1000) })() } // myBindWrapp() function myBindWrapp() { function myBind(func, funcThis, array) { return function () { let args = () => { let newArr = [] let i = 0 for (const el of array) { if (el === undefined) { newArr.push(arguments[i]) i++ } else { newArr.push(el) } } return newArr } // console.log(args()) return func.apply(funcThis, args()) } } let pow5 = myBind(Math.pow, Math, [undefined, 5]) let cube = myBind(Math.pow, Math, [undefined, 3]) pow5(2) cube(3) console.log(pow5(2)) console.log(cube(3)) let chessMin = myBind(Math.min, Math, [undefined, 4, undefined, 5,undefined, 8,undefined, 9]) chessMin(-1,-5,3,15) console.log(chessMin(-1,-5,3,15)) let zeroPrompt = myBind(prompt, window, [undefined, "0"]) let someNumber = zeroPrompt("Введите число") myBind((...params) => params.join(''), null, [undefined, 'b', undefined, undefined, 'e', 'f'])('a','c','d') === 'abcdef' console.log(myBind((...params) => params.join(''), null, [undefined, 'b', undefined, undefined, 'e', 'f'])('a','c','d')) }