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What's a quick way to test to see a file exists?
I want to quickly check to see if a file exists in my iPhone app's Documents directory (or any path for that matter). I can enumerate through the directory's files, or I can try to open a specific file. What's the fastest way? I just need to know if the file is there or if it does not exist.
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setting multiple column using one update
How to set multiple columns of a table using update query in mysql?
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XPath: How to check if an attribute exists?
Given the following XML, how do I write an XPath query to pull nodes where the attribute foo exists?:
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LINQ query to return a Dictionary
I have a collection of MyClass that I'd like to query using LINQ to get distinct values, and get back a Dictionary as the result, but I can't figure out how I can do it any simpler than I'm doing below. What would some cleaner code be that I can use to get the Dictionary as my result?
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How can I tell if my server is serving GZipped content?
...ave a webapp on a NGinx server. I set gzip on in the conf file and now I'm trying to see if it works. YSlow says it's not, but 5 out of 6 websites that do the test say it is. How can I get a definite answer on this and why is there a difference in the results?
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PHP sprintf escaping %
... with another %:
$stringWithVariables = 'About to deduct 50%% of %s %s from your Top-Up account.';
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GROUP_CONCAT comma separator - MySQL
I have a query where I am using GROUP_CONCAT and a custom separator as my results may contain commas: '----'
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Avoiding memory leaks with Scalaz 7 zipWithIndex/group enumeratees
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This will come as little consolation for anyone who's stuck with the older iteratee API, but I recently verified that an equivalent test passes against the scalaz-stream API. This is a newer stream processing API that is intended to repl...
What are the differences between segment trees, interval trees, binary indexed trees and range trees
What are differences between segment trees, interval trees, binary indexed trees and range trees in terms of:
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How to find which rspec test is taking so long
One (or a couple) of our tests are taking forever and we'd like to optimize them.
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