ENV.delete_if

ENV.delete_if e$B$,e(B ENV
e$B<+?H$rJV$9$N$OJQ$J$s$8$c$J$$$G$7$g$&$+!#e(B

% ./ruby -ve ‘p ENV.delete_if.equal?(ENV)’
ruby 1.9.0 (2008-05-01 revision 16248) [i686-linux]
true

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