Github user witgo commented on the pull request:
https://github.com/apache/spark/pull/760#issuecomment-43394756
@kanzhang
```
scala> sc.parallelize((1D to 2D).by(0.2),4).collect
res0: Array[Double] = Array(1.0, 1.2, 1.6, 1.8)
```
```
scala> sc.parallelize((1D to 2D).by(0.2),5).collect
res5: Array[Double] = Array(1.0, 1.2, 1.4, 1.5999999999999999,
1.7999999999999998, 1.9999999999999998)
```
The first one should be wrong.
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