240624

2024-06-24 11:47:26 +02:00
parent d758882972
commit c797db0f36
5 changed files with 119 additions and 3 deletions
--- a/6.4NFE/index.html
+++ b/6.4NFE/index.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Title</title>
+</head>
+<body>
+    <script src="t.js"></script>
+</body>
+</html>
--- a/6.4NFE/t.js
+++ b/6.4NFE/t.js
@@ -20,10 +20,14 @@ console.log(user.sayBye.name)
 console.log(user.sayHi.name)

 function ask(question, ...handlers){
-    let isYes = confirm(question);
+    // let isYes = confirm(question);
+    let isYes;
+    let decision = Math.floor(Math.random() * 2);
+    isYes = decision !== 0;
+    console.log(`isYes? ${isYes}`);

    for(let handler of handlers){
-        if (handler.length == 0){
+        if (handler.length === 0){
            if (isYes) handler();
        }else{
            handler(isYes);
@@ -35,10 +39,51 @@ ask("Question?", () => console.log('You said yes'), result => console.log(result

 console.log("the difference between the counter.count and closure is the counter.count can be accessed outside but closure cannot");

-let sayHi = function func(who){
+sayHi = function func(who){
    console.log(`Hello, ${who}`);
 };

 sayHi("John");

+function makeCounter(){
+    function counter(){
+        return counter.count++;
+    }
+    counter.set = function setCounter(value){
+        counter.count = value;
+    }
+
+    counter.decrease = function decreaseCounter(){
+        counter.count--;
+    }
+    counter.count = 0
+    return counter;
+}
+
+let counter1 = makeCounter();
+counter1()
+console.log(counter1())
+counter1.set(45)
+console.log(counter1.count)
+counter1.decrease()
+console.log(counter1.count)
+
+function sum(a){
+    let currentSum = a;
+
+    function f(b){
+        currentSum += b;
+        return f
+    }
+
+    f.toString = function(){
+        return currentSum;
+    }
+    return f;
+}
+
+console.log(sum(1)(2));
+console.log(sum(1)(-2));
+alert(sum(1)(2));
+alert(sum(1)(-2));

--- a/6.5NewFunctionGrammar/index.html
+++ b/6.5NewFunctionGrammar/index.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Title</title>
+</head>
+<body>
+<script src="t.js"></script>
+</body>
+</html>
--- a/6.5NewFunctionGrammar/t.js
+++ b/6.5NewFunctionGrammar/t.js
@@ -0,0 +1,7 @@
+let func = new Function('a', 'b', 'return a+b');
+
+console.log(func(1,2))
+
+let x = 10;
+func = new Function('return x;');
+console.log(func()); // Error: x is not defined
--- a/6.6setTimeoutandsetInterval/t.js
+++ b/6.6setTimeoutandsetInterval/t.js
@@ -0,0 +1,44 @@
+function sayHi(){
+    console.log('Hello');
+}
+
+setTimeout(sayHi, 1000);
+
+function sayHi2(phrase, who){
+    console.log(phrase + ',' + who);
+}
+setTimeout(sayHi2, 100, "Hi", "John");
+
+
+let timerId = setInterval(()=>console.log(('tick')), 1000);
+
+setTimeout(() => {clearInterval(timerId); console.log('stop!')}, 5000);
+
+timerId = setTimeout(function tick(){
+    console.log('tick');
+    timerId = setTimeout(tick, 1000);
+}, 1000)
+
+function printNumbers(from, to){
+    let cur = from
+
+    let timerId = setInterval(() => {
+        console.log(cur)
+        if(cur == to){
+            clearInterval(timerId);
+        }
+        cur += 1;
+    }, 1000);
+}
+function  printNumbers2(from, to){
+    cur = from
+    setTimeout(function go() {
+        console.log(cur);
+        if(cur < to){
+            setTimeout(go, 1000);
+        }
+        cur++;
+    }, 1000)
+}
+printNumbers(10, 15);
+printNumbers2(10, 15);