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How can I see the SQL that will be generated by a given ActiveRecord query in Ruby on Rails

... write a plugin that would do something like: SampleModel.find(:all, :select => "DISTINCT(*)", :conditions => ["date > #{self.date}"], :limit => 1, :order => 'date', :group => "date").show_generated_sql and have this call the construct_finder_sql method. ...
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Does order of where clauses matter in SQL?

...rstName) (or both) On the other hand - again for SQL Server - if you use SELECT * to grab all columns from a table, and the table is rather small, then there's a good chance the query optimizer will just do a table (or clustered index) scan instead of using an index (because the lookup into the fu...
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What is in your Mathematica tool bag? [closed]

...pplication of Reap and Sow which mimics/extends the behavior of GatherBy: SelectEquivalents[x_List,f_:Identity, g_:Identity, h_:(#2&)]:= Reap[Sow[g[#],{f[#]}]&/@x, _, h][[2]]; This allows me to group lists by any criteria and transform them in the process. The way it works is that a c...
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Build project into a JAR automatically in Eclipse

...con on build.xml. Step 2 Right-click on the root node in the project. - Select Properties - Select Builders - Select New - Select Ant Build - In the Main tab, complete the path to the build.xml file in the bin folder. Check the Output The Eclipse output window (named Console) should show...
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vim - How to delete a large block of text without counting the lines?

...ed {v}), Visual Line Mode (Line based {S-v}) and Visual Block Mode (Allows selection of blocks {C-v}) – Tom Regner Apr 3 '11 at 18:10  |  show...
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Cross-browser custom styling for file upload button [duplicate]

... This works great for me, my only issue is that after a file is selected, it doesn't actually show that a file has been selected. Is there any way to show an indicator that a file has been chosen? – Dylan Vester Feb 27 '15 at 21:27 ...
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Inspect hovered element in Chrome?

...er over the element to bring up the tooltip, right click as if you were to select 'Inspect Element'. Leaving that context menu open, move the focus over to the dev tools. The html for the tooltip should show up next to the element its a tooltip for in the HTML. Then you can look at it as if it were ...
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Renaming xcode 4 project and the actual folder

...e, click the icon shown in the screenshot below to bring up a file dialog. Select the folder that you previously renamed. This will re-associate the virtual folder with the real folder on disk, and will automatically fix the links to all the files inside. In your build settings, search for the old f...
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How to change port number for apache in WAMP

... Click on the WAMP server icon and from the menu under Config Files select httpd.conf. A long text file will open up in notepad. In this file scroll down to the line that reads Port 80 and change this to read Port 8080, Save the file and close notepad. Once again click on the wamp server i...
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How to find server name of SQL Server Management Studio

... Run this Query to get the name SELECT @@SERVERNAME share | improve this answer | follow | ...