groovy - 查找并修改集合中的重复条目

Question

我需要查找并修改集合中的重复条目。

我可以执行以下操作，该操作有效，但需要几个步骤。

是否有更清晰的方法来实现最终输出，指示所有具有重复项的条目？

void "test find and mark duplicate entries"() {
    given:
    def sports = ["baseball", "basketball", "football", "basketball", "basketball", "football", "soccer", "volleyball"]

    when:
    def duplicateEntries = sports.findAll { sports.count(it) > 1 }.unique()

    then:
    duplicateEntries == ["basketball", "football"]

    when:
    sports = sports.collect {
        if (duplicateEntries.contains(it)) {
            return it + "-dupe"
        } else {
            return it
        }
    }

    then:
    sports == ["baseball", "basketball-dupe", "football-dupe", "basketball-dupe", "basketball-dupe", "football-dupe", "soccer", "volleyball"]
}

Answer 1

与其他答案相同的复杂性，只是内存效率更高;-)

def sports = ["baseball", "basketball", "football", "basketball", "basketball", "football", "soccer", "volleyball"]
sports.collect { sports.count(it) > 1  ? "$it-dupe" : it }