[ruby-core:23228] [Bug #1385] Wonderful undocumented feature in Ruby 1.8.7 & 1.9

Issue #1385 has been updated by Marc-Andre Lafortune.


As pointed out by Joel VanderWerf, my second usage example is wrong (it takes commas instead of =>). It should read:

/*
 *  call-seq:
 *     Hash[ key, value, ... ]   => hash
 *     Hash[ [ [key, value], ... ] ]   => hash
 *     Hash[ object ]   => hash
 *
 *  Creates a new hash populated with the given objects. Equivalent to
 *  the literal <code>{ <i>key</i> => <i>value</i>, ... }</code>. In the first
 *  form, keys and values occur in pairs, so there must be an even number of arguments.
 *  The second and third form take a single argument which is either
 *  an array of key-value pairs or an object convertible to a hash.
 *
 *     Hash["a", 100, "b", 200]             #=> {"a"=>100, "b"=>200}
 *     Hash[ [ ["a", 100], ["b", 200] ] ]   #=> {"a"=>100, "b"=>200}
 *     Hash["a" => 100, "b" => 200]         #=> {"a"=>100, "b"=>200}
 *     {"a" => 100, "b" => 200}             #=> {"a"=>100, "b"=>200}
 */

Sorry!

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http://redmine.ruby-lang.org/issues/show/1385

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