Pipes实现LeetCode(193.验证电话号码)

[LeetCode] 192.Word Frequency 单词频率 Write a bash script to calculate the frequency of each word in a text file words.txt. For simplicity sake, you may assume: words.txt contains only lowercase characters and space ' ' characters. Each word must consis

[LeetCode] 194.Transpose File 转置文件 Given a text file file.txt, transpose its content. You may assume that each row has the same number of columns and each field is separated by the ' ' character. For example, if file.txt has the following content: na

[LeetCode] 190. Reverse Bits 颠倒二进制位 Reverse bits of a given 32 bits unsigned integer. Example 1: Input: 00000010100101000001111010011100 Output: 00111001011110000010100101000000 Explanation: The input binary string 00000010100101000001111010011100 re

[LeetCode] 188.Best Time to Buy and Sell Stock IV 买卖股票的最佳时间之四 Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may complete at most k transactions. Note: You m

[LeetCode] 309.Best Time to Buy and Sell Stock with Cooldown 买股票的最佳时间含冷冻期 Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may complete as many transactions as

[LeetCode] 191.Number of 1 Bits 位1的个数 Write a function that takes an unsigned integer and returns the number of '1' bits it has (also known as the Hamming weight). For example, the 32-bit integer '11' has binary representation 00000000000000000000000

[LeetCode] 557.Reverse Words in a String III 翻转字符串中的单词之三 Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order. Example 1: Input: "Let's take LeetCode conte

[LeetCode] 195.Tenth Line 第十行 How would you print just the 10th line of a file? For example, assume that file.txt has the following content: Line 1 Line 2 Line 3 Line 4 Line 5 Line 6 Line 7 Line 8 Line 9 Line 10 Your script should output the tenth li

[LeetCode] 193.Valid Phone Numbers 验证电话号码 Given a text file file.txt that contains list of phone numbers (one per line), write a one liner bash script to print all valid phone numbers. You may assume that a valid phone number must appear in one of th

下面提供的几款关于js 验证电话号码手机号码正则表达式,是我从网上收藏了,不过都是精品,专业针对手机号与电话号码进行验证的. 复制代码 代码如下: function checkPhone(phone) { //验证电话号码手机号码,包含153,159号段 if (phone==""){ alert("电话号码不能为空!"); return false; } if (phone != ""){ var p1 = /^(([0+]d{2,3}-)?(

JavaScript表单验证电话号码,判断一个输入量是否为电话号码,通过正则表达式实现. 复制代码 代码如下: //检查电话号码 function isTel(str){ var reg=/^([0-9]|[\-])+$/g ; if(str.length<7 || str.length>18){ return false; } else{ return reg.exec(str); }

JavaScript表单验证电话号码,判断一个输入量是否为电话号码,通过正则表达式实现. 复制代码 代码如下: //检查电话号码 function isTel(str){ var reg=/^([0-9]|[\-])+$/g ; if(str.length18){ return false; } else{ return reg.exec(str); } }

[LeetCode] 9. Palindrome Number 验证回文数字 Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1: Input: 121 Output: true Example 2: Input: -121 Output: false Explanation: From left

[LeetCode] 20. Valid Parentheses 验证括号 Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: Open brackets must be closed by the same type of brackets. Open

[LeetCode] 98. Validate Binary Search Tree 验证二叉搜索树 Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less than the node's key. The ri