s = "abc" assert "abc" == s[0..<s.size()] assert "abc" == s[0..-1] assert "ab" == s[0..-2] assert "a" == s[0..<-1] 最後の動作に驚いたので Groovy の Range を調査する。 Range のプロパティ class MyRange extends AbstractList /* implements Range */ { int from, to boolean reverse MyRange(int from, int to) { this.reverse = from >…</s.size()]>