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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, ...
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
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Robert J. Walker
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answered Nov 14 '11 at 21:19
MarceloMarcelo
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Camera access through browser
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radu florescu
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answered May 27 '13 at 15:08
XeroxoidXeroxoid...
Create space at the beginning of a UITextField
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This is what I am using right now:
Swift 4.2
class TextField: UITextField {
let padding = UIEdgeInsets(top: 0, left: 5, bottom: 0, right: 5)
override open func textRect(forBounds bounds: CGRect) -> CGRect {
return bounds.inset(by: padding)
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Eclipse cannot load SWT libraries
Every time I try to open Eclipse in Ubuntu 12.04 I get an Unsatisfied Link Error and it will not open. I have recently installed the java JDK and Android SDK, could this be the problem? I followed this tutorial .
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Drop columns whose name contains a specific string from pandas DataFrame
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import pandas as pd
import numpy as np
array=np.random.random((2,4))
df=pd.DataFrame(array, columns=('Test1', 'toto', 'test2', 'riri'))
print df
Test1 toto test2 riri
0 0.923249 0.572528 0.845464 0.144891
1 0.020438 0.332540 0.144455 0.741412
cols = [c for c...
Number of processors/cores in command line
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edited Apr 9 '14 at 5:31
ajduke
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answe...
Android Studio Google JAR file causing GC overhead limit exceeded error
...roid closure in your build.gradle file:
dexOptions {
javaMaxHeapSize "4g"
}
and see if that helps.
(idea courtesy of this answer from Scott Barta)
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How do I add a new sourceset to Gradle?
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edited Jul 23 '12 at 13:43
answered Jul 20 '12 at 14:30
S...
How do I find duplicate values in a table in Oracle?
...l the LizardBill the Lizard
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