Scalaでdiffコマンドを使ってみたい その2

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の続き。なんとなく。startsWithとかmapなどを使ってみたかった。使ってみたかっただけ。

scala> val a = "diff a.txt b.txt".lineStream_!
a: Stream[String] = Stream(1c1, ?)

scala> a
res3: Stream[String] = Stream(1c1, ?)

scala> a.toList
res4: List[String] = List(1c1, < ddd, ---, > ccc, 11158292d11158291, < eee)

scala> a.filter(x => x startsWith "<")
res5: scala.collection.immutable.Stream[String] = Stream(< ddd, ?)

scala> a.filter(x => x startsWith "<").toList
res6: List[String] = List(< ddd, < eee)

scala> a.filter(x => x startsWith "<").map(x => x.replaceAll("< ", "")).toList
res7: List[String] = List(ddd, eee)

scala> val a = "diff --suppress-common-lines -y a.txt b.txt".lineStream_!
a: Stream[String] = Stream(ddd                                                        | ccc, ?)