1 DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>Titletitle> 6 head> 7 <body> 8 <hr><h1>循环遍历对象“person”的属性h1> 9 <button onclick="myFunction()">点击显示循环button> 10 <p id="demo">p> 11 <p id="demo1">p> 12 <hr><h1>数组方法h1> 13 <p id="demo2">p> 14 <button onclick="myFunction1()">点击将数组作为字符串输出button> 15 <hr><h1>Math（算数） 对象h1> 16 <p id="demo3">p> 17 <button onclick="myFunction2()">点击显示算数button> 18 <hr><h1>RegExp：是正则表达式（regular expression）h1> 19 <p id="demo4">p> 20 21 <script> 22 function myFunction() { 23 var x,txt = ""; 24 var person={fname:"Bill ",lname: "Gates ",age:56}; 25 for (x in person){ 26 txt+=person[x]; 27 } 28 document.getElementById("demo").innerHTML=txt; 29 } 30 function person(firstname,lasrname,age,eyecolor) {//使用函数来构造对象 31 this.firstname = firstname; 32 this.lastname = lasrname; 33 this.age = age; 34 this.eyecolor = eyecolor; 35 // this.nationality = "English"; 36 this.changeName = changeName; 37 function changeName(name) { 38 this.lastname = name; 39 } 40 } 41 person.prototype.nationality = "English";// 添加属性；相当于this.nationality = "English"; 42 person.prototype.name = function(){return this.firstname + " "+ this.lastname};//给对象的构造函数添加新的方法 43 44 myMother = new person("Sally","Rally",48,"Green"); 45 myMother.changeName("Doe");//changeName() 函数 name 的值赋给 person 的 lastname 属性。 46 document.getElementById("demo").innerHTML=myMother.nationality; 47 document.getElementById("demo1").innerHTML=myMother.name(); 48 49 document.write(myMother.lastname); 50 document.write(myMother.firstname,myMother.lastname,myMother.age,myMother.eyecolor); 51 52 var hege = ["Cecilie","Lone"]; 53 var stale = ["Emil","Tobias","Linus"]; 54 var brothers = ["Jani","Tove"]; 55 var Children = hege.concat(stale);//合并两个数组 - concat() 56 var Children1 = hege.concat(stale,brothers);//合并三个数组 - concat() 57 document.write(Children); 58 document.write(Children1); 59 60 function myFunction1() { 61 var fruits = ["Banana","Orange","Apple","Mango","Lemon"]; 62 var x = document.getElementById("demo2"); 63 x.innerHTML = fruits.join(); 64 fruits.pop();//删除数组的最后一个元素 65 x.innerHTML = fruits; 66 fruits.push("Kiwi");//给数组添加新的元素 67 x.innerHTML = fruits; 68 fruits.reverse();//将数组反转排序 69 x.innerHTML = fruits; 70 fruits.shift();//删除数组的第一个元素 71 x.innerHTML = fruits; 72 var citrus = fruits.slice(1,3);//截取数组下标 1 到 2 的元素 73 x.innerHTML = citrus; 74 fruits.sort();//字母升序排列数组 75 x.innerHTML = fruits; 76 var points = [100,10,15,45,56,77];//数字升序排列数组 77 points.sort(function (a,b) {return a-b}); 78 x.innerHTML = points; 79 points.sort(function (a,b) {return b-a});//数字降序排列数组 80 x.innerHTML = points; 81 fruits.splice(2,0,"Lemon","Kiwi","Kiwi1");//向数组第2个位置添加元素;0指的是覆盖后面几个元素 82 x.innerHTML = fruits; 83 x.innerHTML = fruits.toString();//将数组转为字符串并返回 84 fruits.unshift("Pineapple","Pineapple1");//在数组的开头插入元素 85 x.innerHTML = fruits; 86 } 87 88 document.write(""+Math.floor(Math.random()*11));// floor() 方法和 random() 来返回一个介于 0 和 11 之间的随机数 89 function myFunction2() { 90 document.getElementById("demo3").innerHTML=Math.round(2.6);//round 方法对一个数进行四舍五入 91 document.getElementById("demo3").innerHTML=Math.random();//返回一个介于 0 和 1 之间的随机数 92 document.getElementById("demo3").innerText = Math.max(2,2.6);//max() 来返回两个给定的数中的较大的数;min() 来返回两个给定的数中的较小的数 93 } 94 95 var str="Is this all there is?"; 96 var patt1 = /is/gi;//i 不区分大小写的匹配；g 全文的搜索（而不是在找到第一个就停止查找,而是找到所有的匹配） 97 document.write(str.match(patt1)); 98 script> 99 body> 100 html>
Original: https://www.cnblogs.com/chunfang/p/13490158.html
Author: 白月如初12138
Title: JS_进阶-遍历对象属性、数组输出、Math、正则表达式匹配
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