Validate US Telephone Numbers Return true if the passed string is a valid US phone number. The user may fill out the form field any way they choose as long as it is a valid US number. The following are examples of valid formats for US numbers (refer…

Make a Person Fill in the object constructor with the following methods below: getfirstname() getLastName() getFullName() setFirstName(first) setLastName(last) setFullName(firstAndLast) Run the tests to see the expected output for each method. The me…

Exact Change Design a cash register drawer function checkCashRegister() that accepts purchase price as the first argument (price), payment as the second argument (cash), and cash-in-drawer (cid) as the third argument. cid is a 2D array listing availa…

Symmetric Difference Create a function that takes two or more arrays and returns an array of the symmetric difference (△ or ⊕) of the provided arrays. Given two sets (for example set A = {1, 2, 3} and set B = {2, 3, 4}), the mathematical term "symmet…

Record Collection You are given a JSON object representing a part of your musical album collection. Each album has several properties and a unique id number as its key. Not all albums have complete information. Write a function which takes an album's…

如果传入字符串是一个有效的美国电话号码,则返回 true. 思路:用正则,参考网上资料和js高级程序设计(5.4RegExp类型). let telephoneCheck = str => /^1? ?(\(\d{3}\)|\d{3})[ |-]?\d{3}[ |-]?\d{4}$/.test(str); telephoneCheck("555-555-5555"); 如果有不明白的地方请留言,如果有更好更简便更优化的方法请留言,谢谢. 更多内容请访问我的个人博客:Bblog…

function telephoneCheck(str) { // Good luck! //return true; var phone = /^1? ?(\d{3}|\(\d{3}\))[ -]?\d{3}[ -]?\d{4}$/; return phone.test(str); } telephoneCheck("555-555-5555");…

题目 如果传入字符串是一个有效的美国电话号码,则返回 true. 用户可以在表单中填入一个任意有效美国电话号码. 下面是一些有效号码的例子(还有下面测试时用到的一些变体写法): 555-555-5555 (555)555-5555 (555) 555-5555 555 555 5555 5555555555 1 555 555 5555 在本节中你会看见如 800-692-7753 or 8oo-six427676;laskdjf这样的字符串. 你的任务就是验证前面给出的字符串是否是有效的美国电…

function telephoneCheck(str) { // 祝你好运 //var re = /^1? ?(\(\d{3}\)|\d{3})[ |-]?\d{3}[ |-]?\d{4}$/; //var flag = re.test(str); //return flag; return /^1? ?(\(\d{3}\)|\d{3})[ |-]?\d{3}[ |-]?\d{4}$/.test(str); } 题目: 如果传入字符串是一个有效的美国电话号码,则返回 true. telepho…

. . . . . 目录 (一) 一起学 Unix 环境高级编程 (APUE) 之 标准IO (二) 一起学 Unix 环境高级编程 (APUE) 之 文件 IO (三) 一起学 Unix 环境高级编程 (APUE) 之 文件和目录 (四) 一起学 Unix 环境高级编程 (APUE) 之 系统数据文件和信息 (五) 一起学 Unix 环境高级编程 (APUE) 之 进程环境 (六) 一起学 Unix 环境高级编程 (APUE) 之 进程控制 (七) 一起学 Unix 环境高级编程 (APUE)…