我想将地图列表（实际上是具有jeft连接多对多关系表的查询的结果列表）合并到一个地图，如果所有地图中的地图均相等，则该地图将包含一个key：value对和key：[值列表]，以防某个键的值不同。例如，有一个地图列表：
[
[name:john, title:senior, access:floor1],
[name:john, title:senior, access:floor2]
]
到地图
[name:john, title:senior, access:[floor1, floor2]]
因此，给出了地图的输入列表：
def input = [
[name:'john', title:'senior', access:'floor1'],
[name:'john', title:'senior', access:'floor2'],
[name:'carol', title:'senior', access:'floor2']
]
我们可以按前两个分组（同样，作为地图）：
input.groupBy { [name: it.name, title: it.title] }
这给了我们：
[
[name:john, title:senior]:[
[name:john, title:senior, access:floor1],
[name:john, title:senior, access:floor2]
],
[name:carol, title:senior]:[
[name:carol, title:senior, access:floor2]
]
]
然后，我们可以按照所需的输出形式收集它们，从而得到：
input.groupBy { [name: it.name, title: it.title] }.collect { k, v ->
k + [access: v.access]
}
结果如下：
[
[name:john, title:senior, access:[floor1, floor2]],
[name:carol, title:senior, access:[floor2]]
]
本文收集自互联网，转载请注明来源。
如有侵权，请联系 [email protected] 删除。
我来说两句