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What's wrong with nullable columns in composite primary keys?
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Primary keys are for uniquely identifying rows. This is done by comparing all parts of a key to the input.
Per definition, NULL cannot be part of a successful comparison. Even a comparison to itself (NULL = NULL) will fail. This means a key containing NULL would not work.
Additonally, NULL is al...
How to set the maxAllowedContentLength to 500MB while running on IIS7?
I changed the maxAllowedContentLength to
3 Answers
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ASP.NET: This method cannot be called during the application's pre-start initialization stage
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I see. It automatically defines security and membership rules so you have to override them before you add custom ones. Tricky.
– Jonathan Allen
May 25 '11 at 8:46
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Using HTML5/Canvas/JavaScript to take in-browser screenshots
...mplementation of it into sending feedbacks like you described.
The script allows you to create feedback forms which include a screenshot, created on the client's browser, along with the form. The screenshot is based on the DOM and as such may not be 100% accurate to the real representation as it do...
Optimal settings for exporting SVGs for the web from Illustrator?
...VG logo for a website — to make it look great on a responsive design for all devices.
2 Answers
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HTTP authentication logout via PHP
...ecification (section 15.6):
Existing HTTP clients and user agents typically retain authentication
information indefinitely. HTTP/1.1. does not provide a method for a
server to direct clients to discard these cached credentials.
On the other hand, section 10.4.2 says:
If the request...
Convert NSDate to NSString
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How about...
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy"];
//Optionally for time zone conversions
[formatter setTimeZone:[NSTimeZone timeZoneWithName:@"..."]];
NSString *stringFromDate = [formatter stringFromDate:myNSDateInstance];
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How can I scroll a web page using selenium webdriver in python?
...selenium webdriver to parse through facebook user friends page and extract all ids from the AJAX script. But I need to scroll down to get all the friends. How can I scroll down in Selenium. I am using python.
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Calling Python in Java?
...to have python code inside java. Wrap your python code with flask or other web framework to make it as a microservice. Make your java program able to call this microservice (e.g. via REST).
Beleive me, this is much simple and will save you tons of issues. And the codes are loosely coupled so they a...
How to use dashes in HTML-5 data-* attributes in ASP.NET MVC
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Still no luck with WebGrid.GetHtml(htmlAttributes: new { data_some : "thing" }). :'(
– Rubens Mariuzzo
Nov 26 '12 at 16:04
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