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Finding duplicate values in MySQL
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But how is this useful if you can't get the IDs of the rows with duplicate values? Yes, you can do a new query matching for each duplicate value, but is it possible to simply list the duplicates?
– NobleUplift
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When to use nil, blank, empty? [duplicate]
Is there any guidelines on how to differentiate between .nil? , .blank? and .empty? ?
4 Answers
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What is recursion and when should I use it?
...ation which can eliminate some classes of stack overflow. Put succinctly: if a function's return expression is simply the result of a function call, then you don't need to add a new level onto the stack, you can reuse the current one for the function being called. Regrettably, few imperative langu...
Use Font Awesome Icon in Placeholder
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You can't add an icon and text because you can't apply a different font to part of a placeholder, however, if you are satisfied with just an icon then it can work. The FontAwesome icons are just characters with a custom font (you can look at the FontAwesome Cheatsheet for the escape...
Calculating text width
...on the third line after '</span>', though it doesn't seem to make a difference (worked with or without it on FF9).
– shmeeps
Jan 12 '12 at 18:33
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How can I verify if a Windows Service is running
...rvice typically takes some time to start. I'd like to check, from my code, if the service is running. How can I accomplish this?
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Is HTML considered a programming language? [closed]
...guess the question is self-explanatory, but I'm wondering whether HTML qualifies as a programming language (obviously the "L" stands for language).
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How do I specify the exit code of a console application in .NET?
...on in .NET. It's just a test part of a larger application. I'd like to specify the "exit code" of my console application. How do I do this?
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angularJS: How to call child scope function in parent scope
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That's pretty cool! But, what if you don't (want to) know where the caller scope is (I mean in $scope.$parent or in $scope.$parent.$parent, etc)? Ah, yes: pass a callback in params! :)
– user2173353
Jul 28 '14 at 11:...
XPath: How to check if an attribute exists?
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Short and sweet:
//*[@foo]
Of course you should use a more specific expression. But with [@attributeName] you get all nodes which have that attribute.
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