Command validation tool
cmdok checks that specified commands are OK. If command is OK than it exists in PATH and can be run. It is a simple, small and portable Bash script. It is useful in software packages that want to check that some commands exist before trying to run them. See wiki for more information and examples.
DAPI (Data structures and Algorithm Programing Interface) is a programing interface of data structures and algorithms use c language, it supports multiple task