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What's the difference between a Future and a Promise?
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edited Jun 3 '15 at 8:51
answered Jan 26 '13 at 22:07
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Calculating days between two dates with Java
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UPDATE: The original answer from 2013 is now outdated because some of the classes have been rep...
micro:bit 实验07 - 手机调色，点亮一颗 RGB LED · App Inventor 2 中文网
...成输出
第 2 步：一根滑动条控制一路
第 3 步：加几个预设色
五、排错表
六、下一步
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What is the difference between map and flatMap and a good use case for each?
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rdd.map(_.length).collect
res1: Array[Int] = Array(13, 16)
But flatMap (loosely speaking) transforms an RDD of length N into a collection of N collections, then flattens these into a single RDD of results.
rdd.flatMap(_.split(" ")).collect
res2: Array[String] = Array(...
Why does the JVM still not support tail-call optimization?
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Why do results vary based on curly brace placement?
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ResiduumResiduum
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