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Unique constraint that allows empty values in MySQL

I have a field that stores product codes. The codes are unique, but some products simply doesn't have a code. I can't invent codes because those are providers codes. ...
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Django fix Admin plural

How do I change some models name from "m>Catm>egorys" to "m>Catm>egories" on admin site in the new dev django version? In the old version (whithout admin sites and admin models) you could just do this; http://www.the-dig.com/blog/post/customize-plural-name-django-admin/ ...
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GCD to perform task in main thread

I have a callback which might come from any thread. When I get this callback, then I would like to perform a certain task on the main thread. ...
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How can I append a string to an existing field in MySQL?

I want to update the code on all my record to what they currently are plus _standard any ideas? 2 Answers ...
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How do you receive a url parameter with a spring controller mapping

This issue seems trivial, but I can't get it to work properly. I'm calling my Spring controller mapping with jquery ajax. The value for someAttr is always empty string regardless of the value in the url. Please help me determine why. ...
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How to change the default font size in ggplot2

I'd like to know if it is possible to change some default parameters of ggplot2 graphics, like font size for instance, for a whole R session. The idea is to avoid setting them for each plot. ...
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what does npm -D flag mean?

I am about to install this npm package and it says npm install -D load-grunt-config , what does the -D flag do? 3 Answer...
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Can I stretch text using CSS?

...an I stretch text in CSS? I don't want the font to be bigger, because that makes it appear bolder than smaller text beside it. I just want to stretch the text vertically so it's kind of deformed. This would be in one div, and then the normal text beside it would be in another div. How can I do this...
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Javadoc: package.html or package-info.java

When trying to create package level Javadoc comments, whats the preferred method? What do you do? 1 Answer ...
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Browser support for URLs beginning with double slash

I've recently seen a few links used without a protocol. It didn't seem too difficult to understand - I think it's a great idea and pretty intuitive. ...