Useful tips for everyday
How to get user names from / etc / passwd? Trawl through /etc/passwd with grep to get user names, and then use id to specify…
How do I force BIOS to update from Command Prompt? In the Command Prompt window, at the C:\Windows\system32> prompt, type in cd\ and press Enter…
How do you get rid of brush stroke in Illustrator? Remove brush strokes Select a brushed path. In the Brushes panel, choose Remove Brush Stroke…
What is latching type switch? A latching switch is a switch that maintains its state after being activated. A push-to-make, push-to-break switch would therefore be…
What are the three methods of aggregation in MongoDB? MongoDB provides three ways to perform aggregation: the aggregation pipeline, the map-reduce function, and single purpose…
How do you read integers separated by space? Explaination Use readLine() method of BufferedReader and scan the whole String. Split this String for str.split(“\\s”) Iterate…
Does make work with Clang? cpp you can compile it with make CXX=g++ test or make CXX=clang test and it should pass the appropriate flags…
Are MQTT brokers free? You can install an MQTT broker on your own server hardware including a raspberry Pi. There are many brokers/servers to choose…
How to create a covariance matrix in R? [This is the easiest way to get a covariance matrix in R.] But we’ll use the following…
How do I decrypt Vigenere cipher? To decrypt, take the first letter of the ciphertext and the first letter of the key, and subtract their…