<b_jonas> learn norm is the name of the functions in the Eigen and opencv libraries to compute the 2-norm of a vector, and the name of the function in C++ to compute the squared 2-norm of a complex number

#!/usr/bin/perl -w
$_ = join " ", @ARGV; if (s/^([^ ]*) +([^ ]*) +//) { print "$1: "; exec $2, $_; }