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disolovyov/copy_and_append.rb

Created October 28, 2010 07:07
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Copy and append vs append
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copy_and_append.rb
# Copy and append
s1 = 'hey'
s2 = s1
s1 += 'hi' # Two new string objects are created: 'hi' and the result of s1 + 'hi'
puts s1 # heyhi
puts s2 # hey
# Append
s3 = 'hey'
s4 = s3
s3 << 'hi' # One new string object is created: 'hi'
puts s3 # heyhi
puts s4 # heyhi
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