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What's the valid way to include an image with no src?
...te with a src later with javascript but for ease I want the image tag to exist at pageload but just not display anything. I know <img src='' /> is invalid so what's the best way to do this?
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jQuery Validate - Enable validation for hidden fields
...a input field and it hides the field and replace it with iframe. The field is there, but validation disabled for hidden fields. With validation plugin version 1.8.1 everything works as expected.
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Time complexity of Sieve of Eratosthenes algorithm
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Your n/2 + n/3 + n/5 + … n/97 is not O(n), because the number of terms is not constant. [Edit after your edit: O(n2) is too loose an upper bound.] A loose upper-bound is n(1+1/2+1/3+1/4+1/5+1/6+…1/n) (sum of reciprocals of all numbers up to n), which is...
What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?
... multi-dimensional arrays, the current best option in Haskell, in my view, is repa.
Repa provides high performance, regular, multi-dimensional, shape polymorphic parallel arrays. All numeric data is stored unboxed. Functions written with the Repa combinators are automatically parallel provided y...
Use of alloc init instead of new
...and reading sample code, I notice that objects are usually created using this method:
8 Answers
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Change name of iPhone app in Xcode 4
I want to change the name which is displayed below the app icon on the iPhone screen.
I use Xcode 4 and I have one target with keys:
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What's the difference between including files with JSP include directive, JSP include action and usi
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Overview of JSP Syntax Elements
First, to make things more clear, here is a short overview of JSP syntax elements:
Directives: These convey information regarding the JSP page as a
whole.
Scripting elements: These are Java coding elements such as
declarations, expressions, scriptlets, and comme...
Test if object implements interface
What is the simplest way of testing if an object implements a given interface in C#? (Answer to this question
in Java )
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What is the Ruby (spaceship) operator?
What is the Ruby <=> (spaceship) operator? Is the operator implemented by any other languages?
6 Answers
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The best way to remove duplicate values from NSMutableArray in Objective-C?
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Your NSSet approach is the best if you're not worried about the order of the objects, but then again, if you're not worried about the order, then why aren't you storing them in an NSSet to begin with?
I wrote the answer below in 2009; in 2011, ...