Useful tips for everyday
How to avoid joins on a large table? Tl;dr: Avoid joins on large tables and evaluate parts of queries beforehand to get 100–10,000x performance gains!…
How do you check if a shell script is already running? An easier way to check for a process already executing is the pidof command.…
How do you check if a number is a multiple of another number? So, to tell if any number is a multiple of 2 look…
How to refresh page after form submit? If you want the form to be submitted on the same page then remove the action from the…
How do I access WordPress installation? WordPress access through a direct link On your browser’s address bar, search for your domain name with /wp-admin or…
What is pulse skipping mode? If a very light load current only requires the switch on time to be less than 60 ns typical (110…
How do I know if my CRT tube is bad? Troubleshooting your TV to tell if the CRT is bad can be accomplished when you…
What can you do with a cluster of PIS? You can build a homelab out of a Raspberry Pi cluster. If you are a software…
What causes an electric motor to seize up? An engine can seize due to running on low/no oil, overheating or succumbing to a broken timing…
How do you calculate RMS and SNR? Noise is measured by the Root-Mean-Squared (RMS) value of the fluctuations over time. The SNR is defined as…