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#!/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 two Vectors
a = GSL::Vector.alloc(1, 2, 3, 4, 5)
b = GSL::Vector.alloc(6, 7, 8, 9, 10)
# Show the sum of a and b
a + b
# Add b to a
a += b
# Show a
a
# Subtract b from a
a -= b
# Show a
a
# Create new Vector containing 2 added to all elements of a
a + 2
# Show that a remains unmodified
a
# Add 2 to all elements of a in-place
a += 2
# Show the modified a
a
# Subtract 2 from all elements of a in-place
a -= 2
# Show that a remains unmodified
a
# Show coersion
2 + a
5 - a
# Show that a remains unmodified
a
END
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