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Check if a table exists in Rails
...ecord::Base.connection.data_source_exists? 'table_name' is the correct one now
– Dorian
Dec 30 '16 at 1:35
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show 1 more comment
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Check if a class has a member function of a given signature
...tantiation does not
"do inheritance".
This snag does not affect the well-known SFINAE approach, using "The sizeof() Trick",
for detecting merely whether T has some member function mf (see e.g.
this answer and comments). But
establishing that T::mf exists is often (usually?) not good enough: you may...
Xcode — what is $(SRCROOT)?
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Xcode Help documentation is now version based. Updated link for Xcode 8.3 Build Settings reference.
– SwiftArchitect
May 2 '17 at 19:32
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How to create a file in memory for user to download, but not through server?
...rompt the user to download it, without any interaction with the server?
I know I can't write directly to their machine (security and all), but can I create and prompt them to save it?
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PHP Session Security
...or problems (which is being addressed in PHP 6) is register_globals. Right now one of the standard methods used to avoid register_globals is to use the $_REQUEST, $_GET or $_POST arrays.
The "correct" way to do it (as of 5.2, although it's a little buggy there, but stable as of 6, which is coming s...
How do you automatically resize columns in a DataGridView control AND allow the user to resize the c
...id.AllowUserToOrderColumns = true;
grid.AllowUserToResizeColumns = true;
Now the column widths can be changed and the columns can be rearranged by the user. That works pretty well for me.
Maybe that will work for you.
sha...
Deprecation warning when using has_many :through :uniq in Rails 4
... @DylanMarkow the link for Upgrading to Rails 4 is defunct. The book has now been released under a CC license at github.com/alindeman/upgradingtorails4
– Ivar
Jan 19 '15 at 22:03
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Setting Access-Control-Allow-Origin in ASP.Net MVC - simplest possible method
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WebAPI 2 now has a package for CORS which can be installed using :
Install-Package Microsoft.AspNet.WebApi.Cors -pre -project WebServic
Once this is installed, follow this for the code :http://www.asp.net/web-api/overview/security/e...
How to remove all of the data in a table using Django
...4.html') ##
it ended deleting all entries from - model == model_4 , but now i get to see a Error screen within Admin console when i try to asceratin that all objects of model_4 have been deleted ...
ProgrammingError at /admin/dc_dash/model_4/
relation "dc_dash_model_4" does not exist
LINE 1: SEL...
JavaScript - cannot set property of undefined
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@JeremyJStarcher: absolutely correct and important to know, but by that level of thinking, JavaScript has no arrays; it only has objects
– vol7ron
Sep 19 '12 at 0:29
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