diff options
| -rw-r--r-- | mrbgems/mruby-enumerator/mrblib/enumerator.rb | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/mrbgems/mruby-enumerator/mrblib/enumerator.rb b/mrbgems/mruby-enumerator/mrblib/enumerator.rb index 1515a7a89..694ad4270 100644 --- a/mrbgems/mruby-enumerator/mrblib/enumerator.rb +++ b/mrbgems/mruby-enumerator/mrblib/enumerator.rb @@ -153,9 +153,15 @@ class Enumerator # def with_index(offset=0) return to_enum :with_index, offset unless block_given? - raise TypeError, "no implicit conversion of #{offset.class} into Integer" unless offset.respond_to?(:to_int) + offset = if offset.nil? + 0 + elsif offset.respond_to?(:to_int) + offset.to_int + else + raise TypeError, "no implicit conversion of #{offset.class} into Integer" + end - n = offset.to_int - 1 + n = offset - 1 enumerator_block_call do |i| n += 1 yield [i,n] |