Question

I need to get the minimum and maximum values in a collection of floating point values, after applying an absolute value conversion. In python I would do this

min(map(abs, [-5, -7, 10, 2]))

how can I perform the same operation in java in the most elegant way?

Answer 1

You might be able to do something crazy, but the most straightforward solution is this:

List<Integer> x = new ArrayList<Integer>(Arrays.asList( {-5,-7,10,2} } );
for( int i = 0; i < x.size(); i++ ){
   x.set( i, Math.abs(x.get(i)) );
}

return Collections.max( x );

Collections and Arrays are infinitely useful.