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What is the difference between map and flatMap and a good use case for each?
...e(Seq("Roses are red", "Violets are blue")) // lines
rdd.collect
res0: Array[String] = Array("Roses are red", "Violets are blue")
Now, map transforms an RDD of length N into another RDD of length N.
For example, it maps from two lines into two line-lengths:
rdd.map(_.length).collect
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Pimpl idiom vs Pure virtual class interface
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redirect COPY of stdout to log file from within bash script itself
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gsamaras
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answered Aug 4 '10 at 8:24
DevSolarDevSolar
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Function to Calculate Median in SQL Server
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2019 UPDATE: In the 10 years since I wrote this answer, more solutions have been uncovered that may yield better results. Also, SQL Server releases since then (especially SQL 2012) have introduced new T-SQL features that can b...
When NOT to use Cassandra?
...roblems.
– Nick Suwyn
Mar 7 '16 at 20:35
NoSQL database is not a thing. NoSQL is just a term used for modern non-relat...
What is the difference between memmove and memcpy?
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answered Jul 29 '09 at 16:03
bdonlanbdonlan
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How to extend an existing JavaScript array with another array, without creating a new array
...th a stack overflow error if array b is too long (trouble starts at about 100,000 elements, depending on the browser).
If you cannot guarantee that b is short enough, you should use a standard loop-based technique described in the other answer.
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WatiN or Selenium? [closed]
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Just want to say that I'm currently working hard on a beta release of WatiN 2.0 somewhere in Q1...
How to know if other threads have finished?
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edited Mar 31 '09 at 23:19
answered Mar 31 '09 at 18:34
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WCF timeout exception detailed investigation
... IIS7 and various clients querying the service. The server is running Win 2008 Server. The clients are running either Windows 2008 Server or Windows 2003 server. I am getting the following exception, which I have seen can in fact be related to a large number of potential WCF issues.
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