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* hash.c (Hash#merge doc): Added explanation for form with block.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@26833 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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marcandre 2010-03-06 17:18:53 +00:00
parent 1a5a2bae57
commit b04536fadf
1 changed files with 6 additions and 2 deletions
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8
hash.c
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@ -1828,12 +1828,16 @@ rb_hash_update(hash1, hash2)
* hsh.merge(other_hash){|key, oldval, newval| block} -> a_hash * hsh.merge(other_hash){|key, oldval, newval| block} -> a_hash
* *
* Returns a new hash containing the contents of <i>other_hash</i> and * Returns a new hash containing the contents of <i>other_hash</i> and
* the contents of <i>hsh</i>, overwriting entries in <i>hsh</i> with * the contents of <i>hsh</i>. If no block is specified, the value for
* duplicate keys with those from <i>other_hash</i>. * entries with duplicate keys will be that of <i>other_hash</i>. Otherwise
* the value for each duplicate key is determined by calling the block
* with the key, its value in <i>hsh</i> and its value in <i>other_hash</i>.
* *
* h1 = { "a" => 100, "b" => 200 } * h1 = { "a" => 100, "b" => 200 }
* h2 = { "b" => 254, "c" => 300 } * h2 = { "b" => 254, "c" => 300 }
* h1.merge(h2) #=> {"a"=>100, "b"=>254, "c"=>300} * h1.merge(h2) #=> {"a"=>100, "b"=>254, "c"=>300}
* h1.merge(h2){|key, oldval, newval| newval - oldval}
* #=> {"a"=>100, "b"=>54, "c"=>300}
* h1 #=> {"a"=>100, "b"=>200} * h1 #=> {"a"=>100, "b"=>200}
* *
*/ */