How to Find All Numbers Disappeared in an Array? (C/C++ Coding Exercise)
Given an array of positive integers from 1 to n, where n is the size of the array, find the missing numbers if any numbers can only appear in …
How to Find Maximum Integer Products using Javascript?
Given an array of non-negative integers, find the maximum integer product of any 3 numbers. For example, the maximum integer product of 3 numbers is 9*3*2=54. Javascript Solution Since …
A Lite Comparison between Linode and Vultr ($5 Basic Plan) Cloud VPS
Quick Comparisons between Linode and Vultr Linode and Vultr are both cloud-hosting providers that specialize in virtual private servers (VPS). Both companies offer servers with multiple locations around the …
Why and How to Turn Off Ping (ICMP) for Servers?
The ping command is popular and it is often used to tell if a server is online. You can ping a host by sending some small packages of data …
How to Respond with 503 Service Busy to Requests when Server Load Average is High?
I got the email notification when the server load is high: Your Server (helloacm) Load Alert Needs Attention! 11.54 110.63 102.98 3/391 5989 and I checked the apache access …
How to Search and Replace using Regular Expression with Arithmetic Evaluation?
Let’s consider this XML data, and you want to add an offset to all Z coordinate. <data> <point> <x> 1 </x> <y> 2 </y> <z> 3 </z> </point> <point> …