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Should I use Java's String.format() if performance is important?
We have to build Strings all the time for log output and so on. Over the JDK versions we have learned when to use StringBuffer (many appends, thread safe) and StringBuilder (many appends, non-thread-safe).
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How to do SELECT COUNT(*) GROUP BY and ORDER BY in Django?
I'm using a transaction model to keep track all the events going through the system
2 Answers
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Why is #!/usr/bin/env bash superior to #!/bin/bash?
...or example, on my OpenBSD system, it's in /usr/local/bin, since it was installed as an optional package.
If you are absolutely sure bash is in /bin and will always be, there's no harm in putting it directly in your shebang—but I'd recommend against it because scripts and programs all have lives b...
How to get the text node of an element?
...wered Jun 29 '11 at 11:58
James AllardiceJames Allardice
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animating addClass/removeClass with jQuery
...xample: http://jsfiddle.net/tw16/JfK6N/
#someDiv{
-webkit-transition: all 0.5s ease;
-moz-transition: all 0.5s ease;
-o-transition: all 0.5s ease;
transition: all 0.5s ease;
}
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When to use Preorder, Postorder, and Inorder Binary Search Tree Traversal strategies
...efore inspecting any leaves, you pick pre-order because you will encounter all the roots before all of the leaves.
If you know you need to explore all the leaves before any nodes, you select post-order because you don't waste any time inspecting roots in search for leaves.
If you know that the tre...
C# Test if user has write access to a folder
I need to test if a user can write to a folder before actually attempting to do so.
18 Answers
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Capybara Ambiguity Resolution
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Specifically, Capybara 2.0 has intelligent waiting logic to ensure specs pass or fail consistently across machines of differing processing speeds while only waiting the minimum necessary time. Using first as suggested above, unless y...
How to count duplicate value in an array in javascript
...- it was me; I was browsing on mobile, and have clicked the button w/o actually noticing. Once I found out it was too late to revert. Apologies for that, the answer is really good. If you want to edit it, I'd be glad to reverse.
– Todor Minakov
Jan 19 '19 at 10...
Should I use multiplication or division?
...wer compared to the lower overhead of the VM. Remember that compilers generally cannot optimize floating point much in order to guarantee precision.
– rasmus
Sep 14 '12 at 7:22
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