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Postgresql aggregate array
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Use array_agg: http://www.sqlfiddle.com/#!1/5099e/1
SELECT s.name, array_agg(g.Mark) as marks
FROM student s
LEFT JOIN Grade g ON g.Student_id = s.Id
GROUP BY s.Id
By the way, if you are using Postgres 9.1, you don't need to repeat the columns on SE...
optional parameters in SQL Server stored proc?
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Creating a div element in jQuery [duplicate]
...tes are in fact perfectly valid in HTML, XML, and XHTML. See stackoverflow.com/questions/2210430/…
– Mark Amery
Dec 5 '13 at 12:29
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PHP function to generate v4 UUID
...at generates a valid v4 UUID in PHP. This is the closest I've been able to come. My knowledge in hex, decimal, binary, PHP's bitwise operators and the like is nearly non existant. This function generates a valid v4 UUID up until one area. A v4 UUID should be in the form of:
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How can I rename a field for all documents in MongoDB?
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db.collection.updateMany(filter, update, options)
https://docs.mongodb.com/manual/reference/method/db.collection.updateMany/
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Base64 Decoding in iOS 7+
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I don't think this code is clean. I get the warning : "incompatible pointer types initializing NNSTring with an expression of NSData"
– drlobo
Nov 26 '13 at 10:27
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How do I remove the “extended attributes” on a file in Mac OS X?
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Use the xattr command. You can inspect the extended attributes:
$ xattr s.7z
com.apple.metadata:kMDItemWhereFroms
com.apple.quarantine
and use the -d option to delete one extended attribute:
$ xattr -d com.apple.quarantine s.7z
$ xattr...
Is Java Regex Thread Safe?
I have a function that uses Pattern#compile and a Matcher to search a list of strings for a pattern.
5 Answers
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EC2 Instance Cloning
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instantbadger.blogspot.com/2009/09/…
– Mike Sherov
Feb 2 '10 at 4:28
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