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One DbContext per web request… why?

...the DbContext caches data, it gets stale pretty soon. This will get you in all sorts of trouble when multiple users/applications work on that database simultaneously (which is very common of course). But I expect you already know that and just want to know why not to just inject a new instance (i.e....
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How to sort an array in descending order in Ruby

... 0.001631 0.110628 ( 0.111532) ...the reverse method doesn't actually return a reversed array - it returns an enumerator that just starts at the end and works backwards. The source for Array#reverse is: static VALUE rb_ary_reverse_m(VALUE ary) { long len = RARRAY_LEN(...
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How to use a variable to specify column name in ggplot

... "cumbersome"? Non-standard evaluation in R is ironically the most cumbersome "feature" I have ever encountered in a programming language. Truly maddening. – jessexknight Feb 4 at 18:10 ...
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How to automate createsuperuser on django?

... Personally I don't think deleting the user on each build is a good idea. You risk unintentionally deleting any associated records via a cascade delete. A safer option is to simply bail-out if the user already exists (or update the ...
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How do I maintain the Immersive Mode in Dialogs?

... I get 'requestFeature() must be called before adding content' (I think it depends on active features on activity). Solution: Move the dialog.show() one line up so show() is invoked before copying SystemUiVisibility (but after setting non-focusable). Then it ...
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Diff output from two programs without temporary files

... use >(command) if you want to pipe something into a command. This is called "Process Substitution" in Bash's man page. share | improve this answer | follow ...
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Booleans, conditional operators and autoboxing

...sight. :-) – Bert F Oct 7 '10 at 14:16 ...
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Best database field type for a URL

...er is subject to the maximum row size (65,535 bytes, which is shared among all columns) and the character set used. So ... < MySQL 5.0.3 use TEXT or >= MySQL 5.0.3 use VARCHAR(2083) share | ...
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What is cURL in PHP?

...the PHP manual. In order to use PHP's cURL functions you need to install the » libcurl package. PHP requires that you use libcurl 7.0.2-beta or higher. In PHP 4.2.3, you will need libcurl version 7.9.0 or higher. From PHP 4.3.0, you will need a libcurl version that's 7.9.8 or higher. ...
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What does passport.session() middleware do?

...n database dirctly – Newbiee Aug 4 '16 at 8:27 1 "in the request headers" ? no just in the reques...