List.all
allcondition 
Group: Logical
Documentation
Checks whether a condition holds for all elements in this list.
Arguments
condition: AFilter_Conditionor a predicate function to test each element.
Examples
Check if all elements in the list are greater than zero.
      import Standard.Examples
      example_all = Examples.list.all (..Greater than=0)
Check if all elements in the list are even.
      import Standard.Examples
      example_all = Examples.list.all (x-> x%2 == 0)