test/standard_deviation_test.rb @@ -1,2 +1,11 @@ module StandardDeviation + def self.included(base) + base.extend ClassMethods + end + + module ClassMethods + def std(column_name, options={}) + calculate :std, column_name, options + end + end end \ No newline at end of file lib/standard_deviation.rb @@ -29,3 +29,13 @@ *[4;36;1mSQL (0.2ms)*[0m *[0;1mSELECT version FROM `schema_migrations`*[0m *[4;35;1mSQL (0.1ms)*[0m *[0mBEGIN*[0m *[4;36;1mSQL (0.2ms)*[0m *[0;1mROLLBACK*[0m + *[4;36;1mSQL (0.1ms)*[0m *[0;1mSET NAMES 'utf8'*[0m + *[4;35;1mSQL (0.1ms)*[0m *[0mSET SQL_AUTO_IS_NULL=0*[0m + *[4;36;1mSQL (0.4ms)*[0m *[0;1mSHOW TABLES*[0m + *[4;35;1mSQL (10.7ms)*[0m *[0mDROP TABLE `measurements`*[0m + *[4;36;1mSQL (78.2ms)*[0m *[0;1mCREATE TABLE `measurements` (`id` int(11) DEFAULT NULL auto_increment PRIMARY KEY, `integer` int(11)) ENGINE=InnoDB*[0m + *[4;35;1mSQL (0.4ms)*[0m *[0mSHOW TABLES*[0m + *[4;36;1mSQL (0.2ms)*[0m *[0;1mSELECT version FROM `schema_migrations`*[0m + *[4;35;1mSQL (0.1ms)*[0m *[0mBEGIN*[0m + *[4;36;1mSQL (0.2ms)*[0m *[0;1mSELECT std(`measurements`.integer) AS std_integer FROM `measurements` *[0m + *[4;35;1mSQL (0.2ms)*[0m *[0mROLLBACK*[0m test/debug.log test/ar_std_test.rb 0ec76e587d1f0b508b9fd437d77639fa29c4b4df Jordan McKible jordan@mckible.com http://github.com/jmckible/standard_deviation/commit/7a4cb5c5efecedc82eb9e7874dc16ef09da96f27 7a4cb5c5efecedc82eb9e7874dc16ef09da96f27 2009-10-02T13:31:57-07:00 2009-10-02T13:31:57-07:00 Implementation outline. Rename test file. a1be4151c92ab07170e78a5b492cab5f54736189 Jordan McKible jordan@mckible.com