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How do I get the MIN() of two fields in Postgres?
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LEAST(a, b):
The GREATEST and LEAST functions select the largest or smallest value from a list of any number of expressions. The expressions must all be convertible to a common data type, which will be the type of the result (see Section 10.5 for deta...
What is the most effective way to get the index of an iterator of an std::vector?
I'm iterating over a vector and need the index the iterator is currently pointing at. AFAIK this can be done in two ways:
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HTML code for an apostrophe
... W3C does view it as an apostrophe. I saw to hell with the proper English and typography a ' is a ’ to most people.
– Cleanshooter
Mar 8 '12 at 17:12
143
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How to save picture to iPhone photo library?
... void *contextInfo);
You only need completionTarget, completionSelector and contextInfo if you want to be notified when the UIImage is done saving, otherwise you can pass in nil.
See the official documentation for UIImageWriteToSavedPhotosAlbum().
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Using wget to recursively fetch a directory with arbitrary files in it
...e I store some config files. I'd like to use wget to pull those files down and maintain their current structure. For instance, the remote directory looks like:
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AES vs Blowfish for file encryption
...d generally recommend AES. My next choices would probably be Serpent, MARS and Twofish in that order. Blowfish would come somewhere after those (though there are a couple of others that I'd probably recommend ahead of Blowfish).
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Is DateTime.Now the best way to measure a function's performance?
I need to find a bottleneck and need to accurately as possible measure time.
15 Answers
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In R, how to get an object's name after it is sent to a function?
...ion when a set of list items are passed from the first argument to lapply (and it also fails when an object is passed from a list given to a for-loop.) You would be able to extract the ".Names"-attribute and the order of processing from the structure result, if it were a named vector that were being...
How to clone an InputStream?
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If all you want to do is read the same information more than once, and the input data is small enough to fit into memory, you can copy the data from your InputStream to a ByteArrayOutputStream.
Then you can obtain the associated array of bytes and open as many "cloned" ByteArrayInputStreams...
git reset --hard HEAD leaves untracked files behind
...'s supposed to reset to a pristine version of what you pulled, as I understand it. Unfortunately, it leaves files lying around, as a git status shows a big list of untracked files.
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