Given string str, the task is to check whether it is a valid HTML tag or not by using Regular Expression.The valid HTML tag must satisfy the following conditions:...
Web Crawler is a bot that downloads the content from the internet and indexes it. The main purpose of this bot is to learn about the different web pages on the internet. This kind of bots is mostly operated by search engines. By applying the search algorithms to the data collected by the web crawlers, search engines can provide the relevant links as a response for the request requested by the user. In this article, let’s discuss how the web crawler is implemented....
Given a string htmlCode which is HTML code of a webpage, the task is to find the missing end tag in the HTML code.Examples:...
Given a string str which has various HTML Entities in it, the task is to replace these entities with their corresponding special character....
The ereg_replace() is an inbuilt function in PHP and is used to search a string pattern in an other string. If pattern is found in the original string then it will replace matching text with a replacement string. You may refer to the article on Regular Expression for basic understanding of pattern matching using regular expressions....
Given two strings s1 and s2, find if s1 is a substring of s2. If yes, return the index of the first occurrence, else return -1....
Given two strings s1 and s2, check whether s2 is a rotation of s1. Examples:...
Given two strings s1 and s2, find if s1 is a substring of s2. If yes, return the index of the first occurrence, else return -1....
Given a numeric string S, the task is to find the maximum length of a subsequence having its left rotation equal to its right rotation....
Given an array arr[] of integers of size N where each element can be in the range [1, M], and two integers X and K. The task is to find K possible numbers in range [1, M] such that the average of all the (N + K) numbers is equal to X. If there are multiple valid answers, any one is acceptable....
