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Ruby on Rails: getting the max value from a DB column
Currently I can make the straight-up SQL query on my DB:
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Does MySQL ignore null values on unique constraints?
I have an email column that I want to be unique. But I also want it to accept null values. Can my database have 2 null emails that way?
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Append an element with fade in effect [jQuery]
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instantiate a class from a variable in PHP?
I know this question sounds rather vague so I will make it more clear with an example:
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Hibernate openSession() vs getCurrentSession()
I have some questions about using Hibernate in JSP web application.
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Prevent ViewPager from destroying off-screen views
I have a ViewPager hooked up to a FragmentPagerAdapter that's displaying three fragments. The ViewPager appears to destroy a hosted fragment's view when it is more than one swipe away from the current position.
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What does the regular expression /_/g mean?
JavaScript:
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Java: Literal percent sign in printf statement
I'm trying to add an actual percent sign into a printf statement in Java and I'm getting the error:
3 Answers
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Easy way to turn JavaScript array into comma-separated list?
I have a one-dimensional array of strings in JavaScript that I'd like to turn into a comma-separated list. Is there a simple way in garden-variety JavaScript (or jQuery) to turn that into a comma-separated list? (I know how to iterate through the array and build the string myself by concatenation if...
Use of “this” keyword in formal parameters for static methods in C#
I've come across several instances of C# code like the following:
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