Useful tips for everyday
What is the covariance of a bivariate normal distribution? In this case we have the variances for the two variables on the diagonal and on…
How do you write the copyright year? The copyright notice generally consists of three elements: The symbol © (the letter C in a circle), or…
How do you show generalization in a use case diagram? In the context of use case modeling the use case generalization refers to the relationship…
Why does my submit button not work? You need to ensure you have the submit button within the form tags, and an appropriate action assigned.…
How do you get list index out of range? To solve the “indexerror: list index out of range” error, you should make sure that you’re…
How do I browse my iPhone Photos on my Mac? Import to your Mac Connect your iPhone, iPad, or iPod touch to your Mac with…
Why does ddrescue only read at random places? Because ddrescue needs to read and write at random places, it only works on seekable (random access)…
How to check if a text column is empty? To get only empty values (and not null values): SELECT * FROM myTable WHERE myColumn =…
Why do my games keep moving back to internal storage? The reason you are getting them going back is likely updates. When an app is…
What is the rule for a NOT logic gate? A NOT gate has just one input. The output of the circuit will be the opposite…