diff options
| -rw-r--r-- | mrblib/hash.rb | 23 | ||||
| -rw-r--r-- | test/t/hash.rb | 9 |
2 files changed, 32 insertions, 0 deletions
diff --git a/mrblib/hash.rb b/mrblib/hash.rb index cb52c1ffe..48ac96e56 100644 --- a/mrblib/hash.rb +++ b/mrblib/hash.rb @@ -319,6 +319,29 @@ class Hash h end + ## + # call-seq: + # hsh.rehash -> hsh + # + # Rebuilds the hash based on the current hash values for each key. If + # values of key objects have changed since they were inserted, this + # method will reindex <i>hsh</i>. + # + # h = {"AAA" => "b"} + # h.keys[0].chop! + # h #=> {"AA"=>"b"} + # h["AA"] #=> nil + # h.rehash #=> {"AA"=>"b"} + # h["AA"] #=> "b" + # + def rehash + h = {} + self.each{|k,v| + h[k] = v + } + self.replace(h) + end + def __update(h) h.each_key{|k| self[k] = h[k]} self diff --git a/test/t/hash.rb b/test/t/hash.rb index eee7c7b6a..3196cc97a 100644 --- a/test/t/hash.rb +++ b/test/t/hash.rb @@ -342,3 +342,12 @@ assert('Hash#inspect') do assert_include ret, '"a"=>100' assert_include ret, '"d"=>400' end + +assert('Hash#rehash') do + h = {[:a] => "b"} + # hash key modified + h.keys[0][0] = :b + # h[[:b]] => nil + h.rehash + assert_equal("b", h[[:b]]) +end |