add String#byteslice() method
-----------------------------
Key: JRUBY-5547
URL: http://jira.codehaus.org/browse/JRUBY-5547
Project: JRuby
Issue Type: Bug
Components: Ruby 1.9.3
Reporter: Charles Oliver Nutter
Assignee: Thomas E Enebo
Text copied from http://redmine.ruby-lang.org/issues/4447. See that bug for
details and MRI patch.
Please add a String#byteslice() method to the Ruby 1.9 core API.
Without that method, I am forced to *inefficiently* perform byte-based string
slicing by (1) unpacking the entire string into an Array (with String#unpack or
worse: my_string.bytes.to_a) then (2) slicing that Array and finally (3)
joining the sliced Array into a string (with Array#pack or worse:
my_array.map(&:chr).join), all as shown below:
{noformat}
class String
unless method_defined? :byteslice
##
# Does the same thing as String#slice but
# operates on bytes instead of characters.
#
def byteslice(*args)
unpack('C*').slice(*args).pack('C*')
end
end
end
{noformat}
Thanks for your consideration.
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