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Possible to do a MySQL foreign key to one of two possible tables?
...table.
Polymorphic Associations are supported by frameworks such as Rails and Hibernate. But they explicitly say that you must disable SQL constraints to use this feature. Instead, the application or framework must do equivalent work to ensure that the reference is satisfied. That is, the value ...
MongoDB/NoSQL: Keeping Document Change History
...his approach is fine though when you're dealing with small-sized documents and/or don't update documents very often.
Only store changes in a new version
Another approach would be to store only the changed fields in a new version. Then you can 'flatten' your history to reconstruct any version of th...
PHP: Storing 'objects' inside the $_SESSION
I just figured out that I can actually store objects in the $_SESSION and I find it quite cool because when I jump to another page I still have my object. Now before I start using this approach I would like to find out if it is really such a good idea or if there are potential pitfalls involved....
Why are my PowerShell scripts not running?
I wrote a simple batch file as a PowerShell script, and I am getting errors when they run.
9 Answers
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'nuget' is not recognized but other nuget commands working
...nuget package using http://docs.nuget.org/docs/creating-packages/creating-and-publishing-a-package#From_a_convention_based_working_directory
as a reference.
My Package Manger Console in Visual Studio is not allowing me to use the 'nuget' command.
I am able to 'Get-help nuguet' and it displays:
...
How do you make an element “flash” in jQuery
I'm brand new to jQuery and have some experience using Prototype. In Prototype, there is a method to "flash" an element — ie. briefly highlight it in another color and have it fade back to normal so that the user's eye is drawn to it. Is there such a method in jQuery? I see fadeIn, fadeOut, and an...
Copy to Output Directory copies folder structure but only want to copy files
... Build Event to copy the files.
Go to project properties, Build Events tab and add the following to the Post-build event command line:
copy "$(ProjectDir)\common\browserhawk\*.*" "$(TargetDir)"
Be sure to include the quotes if your project path has spaces in it.
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Why are Docker container images so large?
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As @rexposadas said, images include all the layers and each layer includes all the dependencies for what you installed. It is also important to note that the base images (like fedora:latest tend to be very bare-bones. You may be surprised by the number of dependencies your in...
Android Studio - local path doesn't exist
After updating Android Studio to 0.2.4 I can't get my project to deploy. There is a complete mismatch of the apk filename.
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Vertical (rotated) text in HTML table
...d site has simplified the rule set to drop legacy Internet Explorer filter and rely more in the now standard transform property:
.box_rotate {
-webkit-transform: rotate(7.5deg); /* Chrome, Opera 15+, Safari 3.1+ */
-ms-transform: rotate(7.5deg); /* IE 9 */
transform: rota...