The PHP Bing Wallpaper Bot Crawler
The Bing has updated a wall paper everyday and we can create a PHP script to crawl it automatically everyday, which can be set to crontab job daily. // …
How to Hide a File in JPEG under Linux Shell?
As we know, the JPEG can be appended data at its end without causing troubles in displaying its image content. Under Linux OS, we can use the following two …
The details tag in HTML5 and the jQuery Implementation
According to W3school, HTML5 has added a new tag, details. Its example usage is: <details> <summary>Computing & Technology.</summary> https://helloacm.com </details> If your browser supports HTML5 and supports this tag, …
How to Find First Unique Character in a String?
Given a string (you may assume it is lowercase letters only), your task is to find out the first unique letter and return its index. If it does not …
CloudFlare Launches Flexible Page-Rules Plan
CloudFlare is now offering the ability to purchase additional Page Rules for your domain. It costs 5 dollar per month to have 5 more additional page rules for any …
C/C++ Find the Difference of Two Lowercase Strings
You are given two strings s and t. String t is generated by random shuffling string s and then add one more letter at a random position. Return the …