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RuntimeException: Unable to instantiate application
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This is a verbose error message raised by underlying framework when dalvik re-install .apk file ...
Add SUM of values of two LISTS into new LIST
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The zip function is useful here, used with a list comprehension.
[x + y for x, y in zip(first, ...
Convert a list to a data frame
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Update July 2020:
The default for the parameter stringsAsFactors is now default.stringsAsFacto...
Convert dmesg timestamp to custom date format
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drescherjm
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answered Dec 15 '12 at 9:01
user180100user180100
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How do I format a Microsoft JSON date?
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41 Answers
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Ruby - elegantly convert variable to an array if not an array already
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edited Aug 21 '13 at 13:40
answered Aug 21 '13 at 13:35
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How to debug a referenced dll (having pdb)
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answered Jul 15 '09 at 9:44
Marc Gravell♦Marc Gravell
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const char* concatenation
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edited Jan 4 '10 at 5:18
answered Jan 3 '10 at 14:05
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My Understanding of HTTP Polling, Long Polling, HTTP Streaming and WebSockets
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4 Answers
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What is the difference between map and flatMap and a good use case for each?
... values from those that return a Some:
val rdd = sc.parallelize(Seq(1,2,3,4))
def myfn(x: Int): Option[Int] = if (x <= 2) Some(x * 10) else None
rdd.flatMap(myfn).collect
res3: Array[Int] = Array(10,20)
(noting here that an Option behaves rather like a list that has either one element, ...