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Difference between Dictionary and Hashtable [duplicate]
...at is the difference between Dictionary and Hashtable. How to decide which one to use?
7 Answers
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How is Racket different from Scheme?
...ng. Also, Racket does have the more restricted letrec -- for example, the one in the r5rs language; it's an intentional choice to use the letrec*-like version in the default language.
– Eli Barzilay
Jul 31 '10 at 15:57
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How to reset / remove chrome's input highlighting / focus border? [duplicate]
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You should be able to remove it using
outline: none;
but keep in mind this is potentially bad for usability: It will be hard to tell whether an element is focused, which can suck when you walk through all a form's elements using the Tab key - you should reflect somehow w...
How to pinch out in iOS simulator when map view is only a portion of the screen?
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Try double tapping with the "Option" key pressed. On the iPhone this causes the MKMapView to zoom out.
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Apache Spark: map vs mapPartitions?
...artition of the source RDD into multiple elements of the result (possibly none).
And does flatMap behave like map or like mapPartitions?
Neither, flatMap works on a single element (as map) and produces multiple elements of the result (as mapPartitions).
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Algorithm to find Largest prime factor of a number
...re several more efficient ways to find factors of big numbers (for smaller ones trial division works reasonably well).
One method which is very fast if the input number has two factors very close to its square root is known as Fermat factorisation. It makes use of the identity N = (a + b)(a - b) =...
Why would I use Scala/Lift over Java/Spring? [closed]
...and useful, especially since Scala has a builtin language-level XML mode. One can write XML inline within Scala methods, including variable bindings in braces. This can be delightful for very simple XML services or mockups of services -- you can bang out a suite of HTTP response actions all in one...
UITableView didSelectRowAtIndexPath: not being called on first tap
... the first tap because you are not deselecting anything. Once you selected one row, when you try to select a second one, the first gets deselected.
– The dude
Sep 4 '14 at 13:30
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Algorithms based on number base systems? [closed]
...ble to numbers too!)
Redundant number systems (systems that have more than one representation of a number) are useful.
If you arrange the first digit to be non-zero or use a zeroless representation, retrieving the head of the data structure can be efficient.
Avoid cascading borrows (from taking the ...
Binding a Button's visibility to a bool value in ViewModel
...ity, not less. If a View doesn't want to use it, it doesn't have to and if one does, it cuts out the pain of having to play with converters or style triggers. Yes, this ties my ViewModel to a presentation technology (WPF vs. ASP.Net MVC, for example) a bit, but I seldom need to mix those technologie...