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ERROR 1452: Cannot add or update a child row: a foreign key constraint fails
...ill need to update the data in the child table (instead of deleting them).
Now, we can utilize Left Join to find all those rows in the child table, which does not have matching values in the parent table. Following query would be helpful to fetch those non-matching rows:
SELECT child_table.*
FROM c...
Access Asset Catalog programmatically
I know it's a new feature and this may not be possible, but I would love to be able to use an Asset Catalog to organize my assets, but I access all of my images programmatically. How would I access my images, now? Do I still access them by their file names like so:
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What's the difference between utf8_general_ci and utf8_unicode_ci?
...Unicode 9.0 - and with no equivalent _general variant. People reading this now should probably use one of these newer collations instead of either _unicode or _general. Much of what's written below is not of much interest anymore if you can use one of the newer collations instead.
Key differences
u...
How do I overload the square-bracket operator in C#?
... +1 for the handy list. FYI the link died. (4 years later, I know)
– Mixxiphoid
Mar 4 '13 at 21:04
I'd li...
Parsing Visual Studio Solution files
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With Visual Studio 2015 there is now a publicly accessible SolutionFile class which can be used to parse solution files:
using Microsoft.Build.Construction;
var _solutionFile = SolutionFile.Parse(path);
This class is found in the Microsoft.Build.dll 14.0....
How to make a website secured with https
...in, so that the employees can connect to app from various locations. (Till now I have built web apps that are hosted internally only)
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How do I override __getattr__ in Python without breaking the default behavior?
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-1 This does modify default behavior. Now you have an AttributeError without the context of the attribute in the exception args.
– wim
Nov 26 '18 at 19:43
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What is stability in sorting algorithms and why is it important?
...vince yourself of that. (by the way, that algorithm is called radix sort)
Now to answer your question, suppose we have a list of first and last names. We are asked to sort "by last name, then by first". We could first sort (stable or unstable) by the first name, then stable sort by the last name....
How to open a second activity on click of button in android app
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@HenryAspden i have edit my code now try this. i have put this code in onCreate try this way.
– J.D.
Nov 2 '12 at 12:15
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How can I fill a div with an image while keeping it proportional?
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An old question but deserves an update as now there is a way.
The correct CSS based answer is to use object-fit: cover, which works like background-size: cover. Positioning would be taken care of by object-position attribute, which defaults to centering.
But there ...