Meaning of list[-1] in Python - Stack Overflow I have a piece of code here that is supposed to return the least common element in a list of elements, ordered by commonality: def getSingle(arr): from collections import Counter c = Counte
How do I make a flat list out of a list of lists? - Stack Overflow If your list of lists comes from a nested list comprehension, the problem can be solved more simply directly by fixing the comprehension; please see How can I get a flat result from a list comprehension instead of a nested list? The most popular solutions here generally only flatten one "level" of the nested list See Flatten an irregular (arbitrarily nested) list of lists for solutions that
What is the difference between list and list [:] in python? When reading, list is a reference to the original list, and list[:] shallow-copies the list When assigning, list (re)binds the name and list[:] slice-assigns, replacing what was previously in the list Also, don't use list as a name since it shadows the built-in
How to check permissions of a specific directory? - Stack Overflow $ ls -ld directory ls is the list command - indicates the beginning of the command options l asks for a long list which includes the permissions d indicates that the list should concern the named directory itself; not its contents If no directory name is given, the list output will pertain to the current directory
How to check certificate name and alias in keystore files? In a bash-like environment you can use: keytool -list -v -keystore cacerts jks | grep 'Alias name:' | grep -i foo This command consist of 3 parts As stated above, the 1st part will list all trusted certificates with all the details and that's why the 2nd part comes to filter only the alias information among those details And finally in the 3rd part you can search for a specific alias (or