Same as List.assoc but return an option

Same as List.assq but return an option

find_map f l Apply f on each element of l until it return Some x and return that result or return None

filter_map f l apply f on each element of l and return the list ef element for which f succeed (i.e. return Some x)

part_map f l apply f on each element of l and return the list of success and the list of failure

Split a list

Compute the sha1 of a string

A hex-encoded string is a string where each character is replaced by two hexadecimal characters which represent his ascii code

The home directory

fill_random str ofs len Fill the given string from ofs to ofs+len-1 with random bytes.