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Ruby on Rails: How do I add a not null constraint to an existing column using a migration?
In my Rails (3.2) app, I have a bunch of tables in my database but I forgot to add a few not null constraints. I've googled around but I can't find how to write a migration which adds not null to an existing column.
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MySQL order by before group by
There are plenty of similar questions to be found on here but I don't think that any answer the question adequately.
9 Answ...
How to edit a JavaScript alert box title?
I'm generating a JavaScript alert with following code in C# .NET page:
11 Answers
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C# binary literals
Is there a way to write binary literals in C#, like prefixing hexadecimal with 0x? 0b doesn't work.
12 Answers
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MSysGit vs. Git for Windows
I am having trouble determining the difference between MSysGit and Git for Windows . How are they different? Why would I choose one over the other?
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Hash Code and Checksum - what's the difference?
My understanding is that a hash code and checksum are similar things - a numeric value, computed for a block of data, that is relatively unique.
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Insert text into textarea with jQuery
I'm wondering how I can insert text into a text area using jquery, upon the click of an anchor tag.
17 Answers
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How to install Java SDK on CentOS?
I have CentOS 5, but I don't know the steps to install Java SDK on Linux.
12 Answers
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Find out if ListView is scrolled to the bottom?
Can I find out if my ListView is scrolled to the bottom? By that I mean that the last item is fully visible.
24 Answers
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How to hash some string with sha256 in Java?
How can I hash some string with sha256 in Java? Does anybody know of any free library for this?
15 Answers
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