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Cannot change column used in a foreign key constraint
...stStupidPerson It's much better than just downvoting without a comment. At least the commenter can guess why the downvotes. Such generic answers like "better be safe than sorry" are not useful.
– Csaba Toth
Oct 24 '18 at 15:46
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How to remove constraints from my MySQL table?
...key constraints, it appears you still need the DROP FOREIGN KEY syntax, at least in MariaDB version 10.2
– Frank Forte
Dec 20 '18 at 18:58
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Drawable image on a canvas
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Very useful! At least when you need just a background picture with no rocket science involved!
– Asim
Jan 6 '15 at 1:31
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Git - working on wrong branch - how to copy changes to existing topic branch
... following trick using a temporary branch to work:
This scenario works at least with VS 2015 Git plugin but would most likely work with any git tool.
checkout and make changes to files in master (ups!, wrong branch)
create a new branch "temp" (or any unused name you choose) from master. Checked o...
Introducing FOREIGN KEY constraint may cause cycles or multiple cascade paths - why?
...which causes the exception.
You must either make the Stage optional in at least one of the entities (i.e. remove the [Required] attribute from the Stage properties) or disable cascading delete with Fluent API (not possible with data annotations):
modelBuilder.Entity<Card>()
.HasRequired(...
Check image width and height before upload with Javascript
...eight < 1100 || width < 750) {
alert("At least you can upload a 1100*750 photo size.");
return false;
}else{
alert("Uploaded image has valid Height and Width.");
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How to make custom error pages work in ASP.NET MVC 4
..."~/ErrorPage/Oops/404" probably should be "~/ErrorPage/Oops?404" right? At least that's what worked for me. Maybe that just depends on the routing.
– Josh Sutterfield
Dec 4 '15 at 23:41
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How can I check if an element exists in the visible DOM?
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@csuwldcat It worked for me, at least in Chrome with document.contains(document.documentElement). document does have Node on its prototype chain, as far as I can tell (document->HTMLDocument->Document->Node)
– alex
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Database Design for Tagging
...ts/
Note that the conclusions there are very specific to MySQL, which (at least in 2005 at the time that was written) had very poor full text indexing characteristics.
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Constructors in JavaScript objects
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@AlanKis (At least in some Javascript engines) the stack trace will in the anonymous function case not even mention Foo, while in the latter case it will know that it's Foo being called. Very helpful for debugging.
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