Author Archives: Hoan Huynh


About Hoan Huynh

Hoan Huynh is the founder and head of 4rapiddev.com. Reach him at hoan@4rapiddev.com


Update iPhone 4s To iOS 5.1 With WiFi or iTunes Posted by in Tips And Tricks | Leave a comment

Maybe you’re noticed that iOS update to version 5.1 which contains improvements and bug fixes since the new iPad (iPad 3) has been released. And this tutorial describes How to download and install iOS 5.1 on iPhone 4s. Continue reading

Example Of crossdomain.xml – Cross Domain Policy File Posted by in Tips And Tricks | Leave a comment

In order for Flash and other client-side technologies be able to submit cross domain, we need to place a file called crossdomain.xml in the website root. And below is an example of crossdomain.xml Continue reading

Manage MacBook Hosts File Easier With Hosts Widget Posted by in Tips And Tricks | Leave a comment

There is a Freeware Dashboard Widgets for Mac OS called HostsWidget that helps to add/edit IP and domains easily. Continue reading

C# ASP.Net Validate Date Posted by in CSharp | 1 Comment

This is just a function written in ASP.NET (C#) that validates an input date (with format dd-MM-yyyy) to see if it’s valid. An message will be displayed for each case to indicate the result. Continue reading

Validate Date With JQuery And Date Object Posted by in Javascript | Leave a comment

This article gives a piece of JavaScript code to validate entered date (birthday for example) which is entered by a user. When the user enters an invalid date, such as abcdef, 99/99/9999 or 02/29/2011, a JavaScript popup appears with the validation message. Continue reading

Check Version, Processor And Memory In MacBook Posted by in Tips And Tricks | Leave a comment

This article describes How to check Processer and Memory in your MacBook. This can determine how powerful your MacBook. For advanced user, you can also check all about the Hardware (Graphics/Displays, Hard Drive), Network, etc. Continue reading

Force Quit Or Kill A Particular Process In Mac OS Posted by in Tips And Tricks | Leave a comment

In case a particular process takes long time to respond, consume lot of memory and CPU power that slow down your Mac or even be hand, you will need to stop that process immediately to free up the memory and release your Mac. Continue reading

Mac OS – View Running Processes Posted by in Tips And Tricks | Leave a comment

In Mac machine/laptop, there is a tool/utility called Activity Monitor that is similar with Task Manager in Windows. We can use this tool to know which processes are running and amount of Memory and CPU they are consuming. Continue reading

Short Keys Capture Screen Shoot In MacBook Posted by in Tips And Tricks | Leave a comment

In Mac machines/laptops, there is a convenience way to capture screen shot (entire desktop/full screen, selection/portion of screen/area or open window). You can either save it as a file on the desktop or save it to the clipboard and be able to paste into another program such as: Microsoft Word, Microsoft PowerPoint, Microsoft Entourage, etc. Continue reading

PHP SSH To Remote Server And Execute Command Posted by in PHP | Leave a comment

There is a PHP library called phpseclib that helps to SSH to a remote server and execute command. We can also get the output and display on the screen. Continue reading