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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, ...
Named capturing groups in JavaScript regex?
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141
ECMAScript 2018 introduces named capturing groups into JavaScript regexes.
Example:
const a...
Getting a random value from a JavaScript array
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24 Answers
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How to increase storage for Android Emulator? (INSTALL_FAILED_INSUFFICIENT_STORAGE)
... "additional emulator command line options," add this:
-partition-size 1024
Then CLOSE the emulator (and remove any devices), and click the debug icon, which will launch the preferred emulator you selected. This is important: Eclipse needs to launch the debugger, not AVD.
That fixed the problem ...
Making button go full-width?
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842
Bootstrap v3 & v4
Use btn-block class on your button/element
Bootstrap v2
Use input-bloc...
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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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...
What is the difference between memmove and memcpy?
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– DanielHsH
Jan 1 '15 at 10:46
10
@DanielHsH 'restrict' is a promise you make the compile...