What is a magic number? Why do many programmers advise that they be avoided? Magic numbers are special value of certain variables which causes the program to behave in an special manner.

Understanding the Context

For example, a communication library might take a Timeout parameter and it can define the magic number "-1" for indicating infinite timeout. ImportError: failed to find libmagic. Check your installation I have magic1.dll (along with the two other files the docs specified) in C:\Windows\System32 so I am not sure what the issue is. I would appreciate any help or workarounds.

Key Insights

Magic Mushroom Dosage Calculator Roughly estimates a dosage in grams based on the species and potency of the mushroom, whether or not it's dried, and other factors. I wrote this calculator in JavaScript to help figure out how many mushrooms to eat to reach the desired trip strength. Point of clarification in regards to the first sentence of text: %%sql is a cell magic and not a line magic. It is sort of referenced here where that syntax like you are trying to use is displayed in an old notebook. KeyError: 'DEFAULT' when attempting to create a table using magic line ...

Final Thoughts

Detailed magic mushroom information including growing shrooms, mushroom identification, spores, psychedelic art, trip reports and an active community. I am trying to resize a logical volume on CentOS7 but am running into the following error: resize2fs 1.42.9 (28-Dec-2013) resize2fs: Bad magic number in super-block while trying to open /dev/mapper/ There is a magic number associated with each binary file , does anyone know how to retrieve this information from the file?