如何在不覆盖当前条目的情况下添加多个Groovy映射条目? [英] How do I add multiple Groovy map entries without overwriting the current entries?
问题描述
def editsMap = [:]
lineEdits.flag.each
{ lineEdits_Flag - >
editsMap.put('FlagId',lineEdits_Flag.id)
editsMap.put('FlagMnemonic',lineEdits_Flag.mnemonic)
editsMap.put('Action',lineEdits_Flag.action)
printlneditsMap:$ {editsMap}
}
第一遍产生此地图:
editsMap:[FlagId:10001,FlagMnemonic:TRA,Action:review]
但是第二遍会覆盖第一遍:
editsMap:[FlagId:10002,FlagMnemonic:REB,Action:deny]
我想要做的是在一张地图中创建多个条目。我需要我的地图来填充这样的东西:
editsMap:[FlagId:10001,FlagMnemonic:TRA,Action:review]
editsMap:[FlagId:10002,FlagMnemonic:REB,Action:deny]
editsMap:[FlagId:10003,FlagMnemonic:UNB,Action:deny]
editsMap:[FlagId:20001,FlagMnemonic: REB,Action:deny]
editsMap:[FlagId:20002,FlagMnemonic:ICD,Action:review]
editsMap:[FlagId:30001,FlagMnemonic:REB,Action:deny]
editsMap: [FlagId:40001,FlagMnemonic:ICD,Action:review]
editsMap:[FlagId:40002,FlagMnemonic:MPR,Action:review]
editsMap:[FlagId:50001,FlagMnemonic:CPT,Action:deny ]
editsMap:[FlagId:60001,FlagMnemonic:DTU,Action:deny]
editsMap:[FlagId:70001,FlagMnemonic:ICD,Action:review]
editsMap:[FlagId: FlagMememonic:MPR,Action:review]
一旦我填充了我的地图,那么我需要能够找到某些值以处理消息。我相信我可以使用以下内容:
def thisValue = appliedEditsMap [FlagId,'10001']?:default
进行快速查找。
可以有人帮助我了解如何以编程方式向Groovy地图添加值,而不覆盖地图中的值?
像 Guava's MultiMap :
Multimap< String,String> myMultimap = ArrayListMultimap.create();
//添加一些键/值
myMultimap.put(Fruits,Bannana);
myMultimap.put(水果,苹果);
myMultimap.put(水果,梨);
myMultimap.put(蔬菜,胡萝卜);
//获取值
集合< string> fruits = myMultimap.get(Fruits);
System.out.println(fruits); // [Bannana,Apple,Pear]
这个人做了一个纯粹的Groovy仿真的Multimap:
class GroovyMultimap {
Map map = [:]
public boolean put key,Object value){
列表列表= map.get(key,[])
list.add(value)
map$ key= list
}
}
您可以使用 putAt
和 getAt
用于地图操作中的合成糖。您还可以尝试 mixin 在地图对象中。
他还使用Groovy与Guava的multimap:
列表属性= ['value1','value2','value3']
Multimap multimap = list.inject(LinkedListMultimap.create()){
Multimap map,object - >
properties.each {
map.put(it,object。$ it)
}
map
}
properties.each {
assertEquals(multimap.get(it),list。$ it)
}
My question with Groovy Maps. I've been searching for a way to programmatically add a new entry to a Groovy map without overwriting the current entry. For example
def editsMap = [:]
lineEdits.flag.each
{ lineEdits_Flag ->
editsMap.put('FlagId',lineEdits_Flag.id)
editsMap.put('FlagMnemonic',lineEdits_Flag.mnemonic)
editsMap.put('Action',lineEdits_Flag.action)
println "editsMap: ${editsMap}"
}
The first pass produces this map:
editsMap: [FlagId:10001, FlagMnemonic:TRA, Action:review]
But the second pass overwrites the first pass with: editsMap: [FlagId:10002, FlagMnemonic:REB, Action:deny]
What I'm trying to do is create multiple entries within the one map. I need my map to populate something like this:
editsMap: [FlagId:10001, FlagMnemonic:TRA, Action:review]
editsMap: [FlagId:10002, FlagMnemonic:REB, Action:deny]
editsMap: [FlagId:10003, FlagMnemonic:UNB, Action:deny]
editsMap: [FlagId:20001, FlagMnemonic:REB, Action:deny]
editsMap: [FlagId:20002, FlagMnemonic:ICD, Action:review]
editsMap: [FlagId:30001, FlagMnemonic:REB, Action:deny]
editsMap: [FlagId:40001, FlagMnemonic:ICD, Action:review]
editsMap: [FlagId:40002, FlagMnemonic:MPR, Action:review]
editsMap: [FlagId:50001, FlagMnemonic:CPT, Action:deny]
editsMap: [FlagId:60001, FlagMnemonic:DTU, Action:deny]
editsMap: [FlagId:70001, FlagMnemonic:ICD, Action:review]
editsMap: [FlagId:70002, FlagMnemonic:MPR, Action:review]
Once I have populated my map then I need to be able to find certain values in order to process a message. I believe that I can use something like:
def thisValue = appliedEditsMap[FlagId, '10001'] ?: "default"
to do a quick lookup.
Can someone help me understand how to programmatically add values to a Groovy map without overwriting the values already in the map?
You want something like Guava's MultiMap:
Multimap<String, String> myMultimap = ArrayListMultimap.create();
// Adding some key/value
myMultimap.put("Fruits", "Bannana");
myMultimap.put("Fruits", "Apple");
myMultimap.put("Fruits", "Pear");
myMultimap.put("Vegetables", "Carrot");
// Getting values
Collection<string> fruits = myMultimap.get("Fruits");
System.out.println(fruits); // [Bannana, Apple, Pear]
This guy makes a pure Groovy emulation of Multimap:
class GroovyMultimap {
Map map = [:]
public boolean put(Object key, Object value) {
List list = map.get(key, [])
list.add(value)
map."$key" = list
}
}
You can use putAt
and getAt
for syntatic sugar in map operations. You can also try a mixin in a map object.
He also uses Groovy with Guava's multimap:
List properties = ['value1', 'value2', 'value3']
Multimap multimap = list.inject(LinkedListMultimap.create()) {
Multimap map, object ->
properties.each {
map.put(it, object."$it")
}
map
}
properties.each {
assertEquals (multimap.get(it), list."$it")
}
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