/usr/share/doc/ruby-gsl/examples/vector/test.rb is in ruby-gsl 2.1.0.3+dfsg1-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | #!/usr/bin/env ruby
# Turn on warnings
$-w = true
require 'irb/xmp'
require 'gsl'
# Apparently, IRB::Frame has a bug that prevents the defaults from working, so
# an XMP instance must be created explicitly this way instead of using the
# otherwise convenient xmp method.
XMP.new(IRB::Frame.top(-1)).puts <<END
# Create one Vector and two Vector::Ints
x = GSL::Vector[1, 2, 3]
y = GSL::Vector::Int[1, 0, 5]
a = GSL::Vector::Int[0, 0, 0]
# Call #any? on them
x.any?
y.any?
a.any?
# Call #all? on them
x.all?
y.all?
a.all?
# Call #none? on them
x.none?
y.none?
a.none?
# Call x.any? with blocks
x.any? { |val| val > 5 }
x.any? { |val| val > 2 }
# Call x.all? with blocks
x.all? { |val| val >= 1 }
x.all? { |val| val >= 2 }
# Call x.none? with blocks
x.none? { |val| val == 1 }
x.none? { |val| val == 5 }
END
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