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What's a quick way to test to see a file exists?
...s 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
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XPath: How to check if an attribute exists?
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If you use and xpath, this maybe can help you:
count(//*[@foo])
it will return count of node/child that have attribute foo
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LINQ query to return a Dictionary
...INQ 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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PHP sprintf escaping %
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Escape it 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
...e 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 replace iteratee.
For completeness, here's the test code:
// create a stream containing `n` arrays with `sz` Ints in each one
def streamArrs(sz: In...
How to find which rspec test is taking so long
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In RSpec 2 and 3, you can use the --profile flag or add --profile to your .rspec file. This will track the top 10 slowest examples.
For RSpec 1, you can use --format o with spec command. It shows a text-based progress bar with profiling of 10 slo...
Where do I mark a lambda expression async?
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Find an item in List by LINQ?
...efault to be my answer of choice - same as Single but returns 'null' if it can't find it.
– Eddie Parker
Mar 7 '13 at 5:46
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