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HW#9.1

stas.vladlenko 1 year ago
parent
4728611c81
commit
87620e90ee
2 changed files with 146 additions and 0 deletions
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  1. 134 0
      HW#9.1/hw9.1.js
  2. 12 0
      HW#9.1/index.html

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HW#9.1/hw9.1.js
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+// makeProfileTimer ==============================================================================
 
+
 
+
 
+makeProfileTimer = () => {
 
+    const starTime = performance.now()
 
+    console.log('START: ' + starTime + ' Ms')
 
+
 
+    return () => {
 
+        const finishTime = performance.now()
 
+        console.log('FINISH: ' + finishTime + ' Ms')
 
+        const result = finishTime - starTime
 
+
 
+        return console.log('RESULT: ' + result + ' Ms')
 
+}
 
+}
 
+
 
+const timer = makeProfileTimer()
 
+console.log('Замеряем время работы этого console.log');
 
+console.log(timer())
 
+
 
+
 
+// makeSaver ==============================================================================
 
+
 
+
 
+makeSaver = (arg) => {
 
+    let result
 
+    let stopFn = true
 
+    return () => {
 
+        if(stopFn){
 
+            stopFn = false
 
+            result = arg()
 
+        }
 
+        console.log(result)
 
+        return result
 
+    }
 
+}
 
+
 
+
 
+let saver = makeSaver(Math.random)
 
+let value1 = saver() 
+let value2 = saver()              
+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)
 
+
 
+
 
+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 ==============================================================================
 
+
 
+
 
+(finalCountdown = (counterVal) => {
 
+    countingFn = () => {
 
+    counterVal ? console.log(counterVal--) : clearInterval(interval)   
+    }
 
+    const interval = setInterval(countingFn,1000)
 
+})(5);
 
+
 
+
 
+// &&
 
+
 
+
 
+const finalCountdown = (counterVal) => {
 
+    let result
 
+     return (() => {
 
+
 
+        for(let i = counterVal; i >= 0; i--){
 
+        result=counterVal
 
+        if(result == 0) return   
+        }
 
+
 
+        console.log(result--)
 
+        setTimeout(finalCountdown,1000,result)
 
+        
+    })()
 
+}
 
+
 
+finalCountdown(5)
 
+
 
+
 
+// myBind ==============================================================================
 
+
 
+
 
+function myBind( fn, isThis, arr ) {
 
+    let result
 
+
 
+    return function (...passParam) {
 
+        for(let i = 0; i < passParam.length; i ++){
 
+
 
+            for(let j = 0; j < arr.length; j ++){
 
+                
+                if(arr[j] === undefined){
 
+                    arr[j] = passParam[i]
 
+                    passParam.shift()
 
+                }
 
+            }
 
+        }
 
+        result = fn.call(isThis,...arr)
 
+        return console.log(result)
 
+    }
 
+}
 
+
 
+
 
+var pow5 = myBind(Math.pow, Math, [undefined, 5])
 
+pow5(2)                
+
 
+var cube = myBind(Math.pow, Math, [undefined, 3]) 
+cube(3)
 
+
 
+var chessMin = myBind(Math.min, Math, [undefined, 4, undefined, 5,undefined, 8,undefined, 9])
 
+chessMin(-1,-5,3,15)
 
+
 
+var zeroPrompt = myBind(prompt, window, [undefined, "0"])
 
+var someNumber = zeroPrompt("Введите число")
 
+
 
+myBind( (...params) => params.join(''), null, [undefined, 'b', undefined, undefined, 'e', 'f'] ) ('a','c','d') === 'abcdef'
 
+
 
+
 
+// ============================================================================================================================================================
 
+
 
+
 
+
 
+
 
+
 
+

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HW#9.1/index.html
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+<!DOCTYPE html>
 
+<html lang="en">
 
+<head>
 
+    <meta charset="UTF-8">
 
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
 
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+    <title>Document</title>
 
+</head>
 
+<body>
 
+    <script src="hw9.1.js"></script>
 
+</body>
 
+</html>