摘要:
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title></head><body><script> //封装函数,找出数组 arr 中重复出现过的元素. //示例: console.log(du 阅读全文
摘要:
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title> <script> //封装一个函数, 查看数字在数组中是否出现过, 如果出现过就返回数字在数组中的位置,没有出现过返回-1; //实例: 阅读全文
摘要:
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title> <script> //有字符串如下: var a = 'name=ross&age=20&sex=woman'; //要求结果如下:{n 阅读全文
摘要:
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title> <script> var a = { name:'rass', age:'20', sex:'woman' };//定义一个变量a赋值{ 阅读全文
摘要:
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title> <script> //截取文件后缀名:abcdef.png.jpg > jpg; var a = 'abcdef.png.jpg'; v 阅读全文
摘要:
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title> <script> //var a = [1,2,3,4,5,1,2,3,4,5,6]; //去掉数组中重复的数字,返回:1,2,3,4, 阅读全文
摘要:
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title> <script> //var a = 'welcome to china'; //将字符串中的三个单词的首字母转化成大写;返回Welco 阅读全文
摘要:
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title> <script> var a = 'abcdeeffffffjjjjjjjjjjj'; var b = {}; for (var i = 阅读全文