Tips & Tricks

135 posts

How to Validate Date when Using jQuery Datepicker

It is a common practice to use some calendar tool for date entry in a web application because it is user friendly and can enforce the format of the entered date to the way you want it to, for example, jQuery Datepicker. But it is also important that user can manually enter a date if they choose not to use the calendar tool or when it is easier to manually enter the date than using […]

How to Legally Install and Use Windows 10 Without Product Key

Do you know you can legally install and use Windows 10 without a product key? If no, you can consider this post the good news for you. I have been switching between Windows and Linux (mainly Ubuntu and Linux Mint) in the past years until the official release of Ubuntu 18.04 LTS when I finally decided to go all out with Ubuntu and wiped Windows from my laptop. And I am happy and satisfied with […]

[Fix] Cannot boot after installing Linux Mint in UEFI mode

Linux Mint is a popular Linux distro and is based on Ubuntu LTS distribution. Recently, Linux Mint 19 was released, almost three months after the release of Ubuntu LTS 18.04, with many new features and I decided to give it a try, but the installation was not as smooth as I expected. First, I got an GRUB installation error:┬áThe ‘grub-efi-amd64-signed’ package failed to install into /target/. Without the GRUB boot loader, the installed system will […]

[Fix] ‘grub-efi-amd64-signed’ package failed to install into /target/

[UPDATE 07-18-2018] It seems that some people still get the same error message after unchecking “Install the third party software” option. If that is the case for you, you can try the following: 1. Reboot your computer with Live USB and start Ubuntu (or Linux Mint) installation again 2. At the “Installation type” step, choose “Something else” 3. Delete all partitions (since you already have trouble installing Ubuntu, I don’t think you need to worry […]

How to Uninstall VMWare Workstation Player 12 in Windows 10

Windows 10 is a great operating system and works great…oh well at least when it’s working it works great. When it’s not working, you will probably be banging your head on the wall and yelling why. Recently I just had a moment like that. I was using VMWare Workstation Player 12 and decided to upgrade to Player 14, so I need to uninstall Player 12 first. It should be a simple task in Windows 10, […]

[Solved] How to install Realtek rtl8812au WiFi Driver in Linux

[UPDATE August 15, 2018] The Github repo in the original post has been fixed, now you can follow the steps in the original post to install the Linux driver. [UPDATE June 7, 2018]: If you are using Ubuntu 18.04 LTS or any distro with kernel 4.15 (or above), then the following steps will not work. The build will fail with kernel 4.15. Hopefully someone will update the source code to be compatible with the latest […]

How to switch to Linux from Windows gradually

This post is for those who had some experience with Linux or had tried Linux before, but never made up mind to switch to it. Linux has become better and better in every aspect of the operating system, especially with the new release of Ubuntu 17.10 and Linux Mint 18.3, I think it is the right time to dive into Linux and eventually switch to Linux from Windows. However, if you think you are still […]

Identifier is null or empty error when adding stored procedure in entity framework data model

You can add database tables and stored procedures in your Entity Framework data model, but you may encounter an ArgumentException error in Visual Studio when adding a stored procedure: An exception of type ‘System.ArgumentException’ occurred while attempting to update from the database. The exception message is: ‘Identifier is null or empty’ The error message is confusing because the actual cause of this error is that the stored procedure does not have a return value. In […]