目录
JavaScript 学习手册二：JS数据类型
第1关：JavaScript 数据类型介绍
第2关：JavaScript 数据类型转换
JavaScript 学习手册五：JS数组
第1关：数组的创建、读写和长度
第2关：数组元素的增减
第3关：数组的遍历和多维数组
第4关：数组的常用方法
第5关：数组的应用——内排序
JavaScript 学习手册八：JS函数
第1关：用函数语句定义函数
第2关：用表达式定义函数
第3关：函数的调用
第4关：未定义的实参
第5关：实参对象
第6关：对象作为参数
第7关：函数对象
JavaScript 学习手册十一：JSON
第1关：JSON对象
第2关：JSON数组
第3关：JSON字符串
JavaScript 学习手册二：JS数据类型
第1关：JavaScript 数据类型介绍
function objectTest() {var a = {name:"myName",id:2};var b = [1,true,2];var c = 1;var d = "1";var e = true;var f;var aType,bType,cType,dType,eType,fType;//请在此处编写代码/********** Begin **********/ aType = "object"; bType = "array"; cType = "number"; dType = "string"; eType = "bool"; fType = "undefined";/********** End **********/return aType+","+bType+","+cType+","+dType+","+eType+","+fType;}第2关：JavaScript 数据类型转换
function mainJs(args1,args2,args3) {//请在此处编写代码/********** Begin **********/ var a = parseInt(args1); var b = parseInt(args2,16); var c = parseFloat(args3);/********** End **********/ return a+b+c;}
JavaScript 学习手册五：JS数组
第1关：数组的创建、读写和长度
var array1 = [1,2,3,"js",4,true,"hello"];var array2 = [true,true,"java",2.1];function mainJs(a) {//请在此处编写代码 /*********begin*********/ if (array1.length == a) { return array1[array1.length-1]; } else return array2[array2.length-1]; /*********end*********/}第2关：数组元素的增减
var testArray = [12,"java","js","c","c++",24,36,"python","c#","css"];function mainJs(a,b) { a = parseInt(a); b = parseInt(b); //请在此处编写代码 /*********begin*********/ for (var i = 0; i < a; i++) { testArray.unshift(testArray.pop()); } return testArray[b]; /*********end*********/}第3关：数组的遍历和多维数组
var arr = [1,2,3,4,5,6,7,8,9,0,10,11,12,13,14,15,16,17,18,19,20,21,23,22];function mainJs(a,b) { a = parseInt(a); b = parseInt(b); //请在此处编写代码 /*********begin*********/ var newarr = new Array(a); for (var i = 0; i < a; i++) { newarr[i] = new Array(b); } var count = 0; for (var i = 0; i < a; i++) { for (var j = 0; j < b; j++) { newarr[i][j] = arr[count++]; } } return newarr; /*********end*********/}第4关：数组的常用方法
function mainJs(myArray) { myArray = myArray.split(","); //请在此处编写代码 /*********begin*********/ var my = new Array(); var i = 0, j = 0; while (myArray.indexOf("a", i) != -1) { my[j] = myArray.indexOf("a", i); i = my[j] + 1; j++; } var mym = new Array(); i = 0, j = 0; while (myArray.indexOf("b", i) != -1) { mym[j] = myArray.indexOf("b", i); i = mym[j] + 1; j++; } var res = new Array(); res = my.concat(mym); return res; /*********end*********/}第5关：数组的应用——内排序
function mainJs(a) { var arr = a.split(","); for(var i = 0;i < arr.length;i++) { arr[i] = parseInt(arr[i]); } //请在此处编写代码 /*********begin*********/ var mi=new Array(); var aLength = arr.length;var temp;var max = arr[0];var maxIndex = 0;for(var i = 0;i < aLength-1;i++) {//共进行n-1次选择for(var j = 1;j < aLength-i;j++) {//一次选择if(arr[j] > max) {max = arr[j];maxIndex = j;}}mi[i]=maxIndex;//将本次选出的最大元素移动到最终的位置上temp = arr[aLength-i-1];arr[aLength-i-1] = arr[maxIndex];arr[maxIndex] = temp;var max = arr[0];var maxIndex = 0;}return mi; /*********end*********/}
JavaScript 学习手册八：JS函数
第1关：用函数语句定义函数
//请在此处编写代码/********** Begin **********/function mainJs(a, b) { return a + b;}/********** End **********/第2关：用表达式定义函数
function mainJs(a) { a = parseInt(a);//请在此处编写代码/********** Begin **********/ var myFunc = function (a) { var x = (a-a%100)/100; var y = (a%100-a%100%10)/10; var z = a%10; return x + y + z; }; /********** End **********/ return myFunc(a);}第3关：函数的调用
//求最大值的函数function getMax(b,c) { return b>c?b:c;}//求最小值的函数var getMin = function(b,c) { return b>c?c:b;}//对象中的求和函数var myObject = { id:1, name:"function", myFunc:function(b,c) { return b+c; }}function mainJs(a,b,c) { a = parseInt(a); b = parseInt(b); c = parseInt(c);//请在此处编写代码/********** Begin **********/ if (a == 1) { return getMax(b, c); } else if (a == 2) { return getMin(b, c); } else return myObject.myFunc(b, c);/********** End **********/}第4关：未定义的实参
function mainJs(a,b,c,d) {//请在此处编写代码/********** Begin **********/ if (a === undefined) { a = "green"; } if (b === undefined) { b = "green"; } if (c === undefined) { c = "red"; } if (d === undefined) { d = "yellow"; } return a + '-' + b + '-' + c + '-' + d;/********** End **********/}第5关：实参对象
//请在此处编写代码/********** Begin **********/function getMax() { var alength = arguments.length; if (alength == 0) return 0; var max = arguments[0]; for (var i = 1; i < alength; i++) { if (max < arguments[i]) max = arguments[i]; } return max;}/********** End **********/function mainJs(a) { a = parseInt(a); switch(a) { case 1:return getMax(23,21,56,34,89,34,32,11,66,3,9,55,123); case 2:return getMax(23,21,56,34,89,34,32); case 3:return getMax(23,21,56,34); case 4:return getMax(23,21,56,34,89,34,32,11,66,3,9,55,123,8888); case 5:return getMax(); default:break; }}第6关：对象作为参数
var park = { name:"Leaf Prak", location:"Fifth Avenue", todayTourists:4000};var computer = { name:"Levenon", price:"$800", memory:"8G"};var city = { name:"HangZhou", country:"Chine", population:9400000}function objectFunction(object) {//请在此处编写代码/********** Begin **********/ var res = ""; for (var i in object) { res += i + ":" + object[i] + ","; } return res;/********** End **********/}function mainJs(a) { a = parseInt(a); switch(a) { case 1:return objectFunction(park); case 2:return objectFunction(computer); case 3:return objectFunction(city); default:break; }}第7关：函数对象
//求数组中奇数元素的个数function getOddNumber(a) { var result = 0; for(var i = 0;i < a.length;i++) { if(a[i]%2 != 0) result++; } return result;}//求数组中偶数元素的个数function getEvenNumber(a) { var result = 0; for(var i = 0;i < a.length;i++) { if(a[i]%2 == 0) result++; } return result;}function getNumber(func,a) {//请在此处编写代码/********** Begin **********/ return func(a);/********** End **********/}//测试接口function mainJs(b,a) { a = a.split(","); var aLength = a.length; for(var i = 0;i < aLength;i++) { a[i] = parseInt(a[i]); } if(b == "getEvenNumber") { return getNumber(getEvenNumber,a); } else { return getNumber(getOddNumber,a); }}
JavaScript 学习手册十一：JSON
第1关：JSON对象
function mainJs(a,b,c) {//请在此处编写代码/********** Begin **********/ var JSONObject = { "key1": a, "key2": b, "key3": c }; delete JSONObject.key3; return a+","+b;/********** End **********/}第2关：JSON数组
var myJson = { "category":"computer", "detail":"programming", "language":[ "js","java","php","python","c" ]}function mainJs(a) { a = parseInt(a);//请在此处编写代码/********** Begin **********/ var res = ""; for (var i = 0; i < a; i++) { res += myJson.language[i] + ","; } return res.slice(0, -1);/********** End **********/}第3关：JSON字符串
var JSONString = '{"key1":"value1","key2":"value2"}';function mainJs(a) {//请在此处编写代码/********** Begin **********/ var JSONObject = JSON.parse(JSONString); JSONObject["key1"] = a; JSONObject.key1 = a; return JSON.stringify(JSONObject);/********** End **********/}JavaScript学习手册十三：HTML DOM——文档元素的操作（一）
第1关：通过id获取文档元素
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>get element by id</title></head><body> <a id="a1" src="https://www.google.com">Google</a> <p id="p1">this is a text</p> <script> <!-- 请在此处编写代码 --> <!---------Begin---------> var myElement = document.getElementById("a1"); <!---------End---------> myElement.href="https://www.educoder.net"; </script></body></html>第2关：通过类名获取文档元素
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>get element by name</title></head><body> <img src="" class="myName"/> <form class="myName" id="myForm"></form> <div class="myName">This is quote</div> <p class="myName">This is what you should get</p> <script> <!-- 请在此处编写代码 --> <!---------Begin---------> var myElement = document.getElementsByClassName("myName")[3]; <!---------End---------> myElement.innerText="I changed the text"; </script></body></html>第3关：通过标签名获取文档元素
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>get element by id</title></head><body> <div class="diva"> <a href="https://www.educoder.net">EduCoder</a> <a href="https://www.facebook.com">FaceBook</a> </div> <div class="divb"> <a href="https://www.twitter.com">Twitter</a> <form name="myForm"></form> <a href="https://www.nudt.edu.cn">NUDT</a> </div> <p id="pp">this is a text</p><script><!-- 请在此处编写代码 --> <!---------Begin---------> var allDiv = document.getElementsByTagName("div"); var myElement = allDiv[1].getElementsByTagName("a")[1]; <!---------End---------> myElement.innerText="nudt";</script></body></html>第4关：html5中获取元素的方法一
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"></head><body> <p>你需要获得的元素是我</p> <p>是楼上</p> <p>是楼上的楼上</p> <script> <!-- 请在此处编写代码 --> <!---------Begin---------> var pElement = document.querySelector("p"); <!---------End---------> console.log(pElement); </script></body></html>第5关：html5中获取元素的方法二
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"></head><body> <p>你需要获得的元素是我</p> <p>包括我</p> <p>还有我</p> <script> <!-- 请在此处编写代码 --> <!---------Begin---------> var pElement = document.querySelectorAll("p"); <!---------End---------> console.log(pElement); </script></body></html>第6关：节点树上的操作
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"></head><body><div id="div1"><div class="cl1"><p>文本</p><a>超链接</a></div><div class="cl2"><select><option>红</option><option>黄</option><option>蓝</option></select></div></div> <script> var cl2 = document.getElementById("div1").lastElementChild; <!-- 请在此处编写代码 --> <!---------Begin---------> var myElement = cl2.firstElementChild.children[1]; <!---------End---------> myElement.innerText = "绿"; </script></body></html>第7关：属性值的获取
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"></head><body> <p id="p"></p> <img class="imgClass"/> <a id="a"></a> <script> <!-- 请在此处编写代码 --> <!---------Begin---------> var srcValue = document.getElementsByTagName("img")[0].getAttribute("class"); <!---------End---------> console.log(srcValue); </script></body></html>第8关：属性值的设置
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"></head><body> <p id="p"></p> <form id="form1" method="get" target="https://abc.xyz/def/ghi">This is form</form> <a id="a"></a> <script> <!-- 请在此处编写代码 --> <!---------Begin---------> var myElement = document.getElementById('form1').setAttribute('method','post'); <!---------End---------> console.log(document.getElementById("form1").method); </script></body></html>
未完待续。。。