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Is there a rule-of-thumb for how to divide a dataset into training and validation sets?

... approximately 0.632, provided that n is not too small, as explained here: https://stats.stackexchange.com/a/88993/16263 For a sample of n=250, the probability of an individual case being selected for a re-sample to 4 digits is 0.6329. For a sample of n=20000, the probability is 0.6321. ...
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Is there a command to refresh environment variables from the command prompt in Windows?

... Here is what Chocolatey uses. https://github.com/chocolatey/choco/blob/master/src/chocolatey.resources/redirects/RefreshEnv.cmd @echo off :: :: RefreshEnv.cmd :: :: Batch file to read environment variables from registry and :: set session variables to th...
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How to convert a Title to a URL slug in jQuery?

...a look at this slug function to sanitize URLs, developed by Sean Murphy at https://gist.github.com/sgmurphy/3095196 /** * Create a web friendly URL slug from a string. * * Requires XRegExp (http://xregexp.com) with unicode add-ons for UTF-8 support. * * Although supported, transliteration is d...
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“Unknown provider: aProvider

...yeoman angular has also been updated to use ng-annotate as of this commit: https://github.com/yeoman/generator-angular/commit/3eea4cbeb010eeaaf797c17604b4a3ab5371eccb However if you are using an older version of yeoman angular like me, just replace ng-min with ng-annotate in your package.json: - ...
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Facebook Architecture [closed]

... http://developers.facebook.com/blog/post/358 You can use HipHop yourself: https://github.com/facebook/hiphop-php/wiki But if you ask me it's a very ambitious and probably time wasting task. Hiphop only supports so much, it can't simply convert everything to C++. So what does this tell us? Well, it...
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How to enable C++11/C++0x support in Eclipse CDT?

...lr.com/post/36441490955/eclipse-mingw-builds Thanks to the user Nobody at https://stackoverflow.com/a/13635080/1149664 share | improve this answer | follow | ...
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Null coalescing in powershell

...e version of PowerShell may come pre-installed on your system; if not, see https://github.com/powershell/powershell. Per the documentation, the following operators are supported out-of-the-box in PowerShell 7.0: Null-coalescing: ?? Null-coalescing assignment: ??= Ternary: ... ? ... : ... These ...
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What is a reasonable code coverage % for unit tests (and why)? [closed]

...recisely that question (in a nicely entertaining manner at that!): http://www.artima.com/forums/flat.jsp?forum=106&thread=204677 Testivus On Test Coverage Early one morning, a programmer asked the great master: “I am ready to write some unit tests. What code coverage should I ...
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Why is Git better than Subversion?

... Google Tech Talk: Linus Torvalds on git http://www.youtube.com/watch?v=4XpnKHJAok8 The Git Wiki's comparison page http://git.or.cz/gitwiki/GitSvnComparsion share ...
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Specify an SSH key for git push for a given domain

...s") the IdentityFile option appends to the list of identities to try. See: https://serverfault.com/questions/450796/how-could-i-stop-ssh-offering-a-wrong-key/450807#450807 share | improve this answe...