Useful tips for everyday
How do you fix username is not in the sudoers file this incident will be reported in Mac? Entered Root using command $ su root…
How can I switch between two power sources? Portable equipment that can operate from a battery pack or an external power source (such as a…
How to count columns with the same ID? You need to count the value of the column value for each id: select t.id, (select count…
How do I share a wired Ethernet connection with all devices? Buy a “USB Ethernet adapter” or similar product, which will take an Ethernet cable…
Is phone a machine? Machine – an apparatus using or applying mechanical power and having several parts, each with a definite function and together performing…
How to create an object using the COM API? Details on creating objects using the COM API can be found in the dedicated page. To…
What is the closed unit ball? A unit ball (open or closed) is a ball of radius 1. A subset of a metric space is…
How do I access a shared iTunes library on my Mac? Set up Home Sharing on your Mac Choose Apple menu > System Preferences.…
How do you write a function in pseudocode? Five concepts are: Use a beginning phrase word to start the function. Use a communication phrase word…
How do you keep a window always on top? Just press CTRL + SPACE on whatever window you want to stay on top. Can I…