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What is the difference between map and flatMap and a good use case for each?
...ize(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, or zero elements)
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Defining custom attrs
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Austyn Mahoney
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answered Aug 9 '10 at 16:11
Rich SchulerRich ...
Pandas - Get first row value of a given column
...df = pd.DataFrame({'foo':list('ABC')}, index=[0,2,1])
In [24]: df['bar'] = 100
In [25]: df['bar'].iloc[0] = 99
/home/unutbu/data/binky/bin/ipython:1: SettingWithCopyWarning:
A value is trying to be set on a copy of a slice from a DataFrame
See the caveats in the documentation: http://pandas.pydata...
IIS Express gives Access Denied error when debugging ASP.NET MVC
...specific to Visual Studio 2012, it can be made at least on Visual Studio 2010 too.
– Loïc Lopes
Sep 2 '13 at 12:59
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Maven 3 warnings about build.plugins.plugin.version
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Add a <version> element after the <plugin> <artifactId> in your pom.xml file....
Upload file to FTP using C#
...catch-block?
– Heinzi
Jan 18 '18 at 10:16
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Visual Studio: How to show Overloads in IntelliSense?
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How can I parse a string with a comma thousand separator to a number?
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answered Feb 2 '17 at 10:45
David MeisterDavid Meister
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How to display long messages in logcat
...g to display long message on logcat. If the length of message is more than 1000 characters, it gets broken.
10 Answers
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How to set a Javascript object values dynamically?
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timw4mailtimw4mail
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