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What is the Scala annotation to ensure a tail recursive function is optimized?

...e to Scala version 2.8.0.RC5 (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_18). Type in expressions to have them evaluated. Type :help for more information. scala> import scala.annotation.tailrec import scala.annotation.tailrec scala> class Tails { | @tailrec def boom(x: Int): Int = { ...
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Would you, at present date, use JBoss or Glassfish (or another) as Java EE server for a new project?

...ce them otherwise? If so, there's your answer. Do I have to use EJBs? Really? Avoid them if at all possible--they are really only needed for very large, enterprise-class systems. Remember that they are merely tools, and big ones at that (can anyone say "Golden Sledgehammer"?). They are heavily...
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Postgres - FATAL: database files are incompatible with server

...an run the below command to upgrade your postgres data directory retaining all data: brew postgresql-upgrade-database The above command is taken from the output of brew info postgres share | impr...
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What's the shebang/hashbang (#!) in Facebook and new Twitter URLs for?

... Are you sure that is all there is to it? I often find that the page loading hangs on a shebang URL on facebook (even after many reloads), but if you manually remove the #!, it works. Not to mention you often get "1.5 URLs" (i.e. the old URL remai...
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How to check if bootstrap modal is open, so i can use jquery validate

... @GregPettit mentions, one can use: ($("element").data('bs.modal') || {})._isShown // Bootstrap 4 ($("element").data('bs.modal') || {}).isShown // Bootstrap <= 3 as discussed in Twitter Bootstrap Modal - IsShown. When the modal is not yet opened, .data('bs.modal') returns undefined, he...
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How to destroy an object?

... objects as soon as the page is served. So this should only be needed on really long loops and/or heavy intensive pages. share | improve this answer | follow |...
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How to disassemble one single function using objdump?

I've got a binary installed on my system, and would like to look at the disassembly of a given function. Preferrably using objdump , but other solutions would be acceptable as well. ...
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What difference is there between WebClient and HTTPWebRequest classes in .NET?

...FtpWebRequest, depend on your request. Below is an example: Example: var _request = (HttpWebRequest)WebRequest.Create("http://stackverflow.com"); var _response = (HttpWebResponse)_request.GetResponse(); WebClient System.Object System.MarshalByRefObject System.ComponentModel....
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py2exe - generate single executable file

... PyInstaller will create a single .exe file with no dependencies; use the --onefile option. It does this by packing all the needed shared libs into the executable, and unpacking them before it runs, just as you describe (EDIT: py2ex...
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Uploading images using Node.js, Express, and Mongoose

...b. // Expose modules in ./support for demo purposes require.paths.unshift(__dirname + '/../../support'); /** * Module dependencies. */ var express = require('../../lib/express') , form = require('connect-form'); var app = express.createServer( // connect-form (http://github.com/visionmedia...