如何从无序的Immutable.List()中删除重复项? (不使用toJS()或toArray())
e.g。
Immutable.List.of("green", "blue","green","black", "blue")
答案 0 :(得分:34)
您可以将其转换为Set。集合是具有唯一值的列表。
Immutable.List.of("green", "blue","green","black", "blue").toSet()
如果您再次需要它,请将其转换回来:
Immutable.List.of("green", "blue","green","black", "blue").toSet().toList()
<强>更新强>
获得唯一值的可能性较小:
Immutable.List.of("green", "blue","green","black", "blue").distinct
答案 1 :(得分:23)
如果您有更复杂的类型,您还可以使用groupBy提供自己的选择器进行比较。以下内容将删除属性.name
上的重复项:
var distinctColors = duplicateColors.groupBy(x => x.name).map(x => x.first()).toList();