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我有一個問題,爲什麼使用收集到字符串數組不工作。收集可能的def隊列= []作爲字符串[]?
這是工作確定
String[][] serversAndQueues = [["server1","queue"],["server1","queue1"],["server2","queue2"]]
serversAndQueues.groupBy { it[ 0 ] }.each { server, value ->
def queues = []
value.collect(queues){
it[1]
}
println "$server => $queues"
}
OUTPUT
server1 => [queue, queue1]
server2 => [queue2]
但如果我嘗試定義隊列作爲一個字符串數組DEF隊列= []作爲字符串[],例外情況
String[][] serversAndQueues = [["server1","queue"],["server1","queue1"],["server2","queue2"]]
serversAndQueues.groupBy { it[ 0 ] }.each { server, value ->
def queues = [] as String[]
value.collect(queues){
it[1]
}
println "$server => $queues"
}
輸出
Exception thrown
groovy.lang.MissingMethodException: No signature of method: java.util.ArrayList.collect() is applicable for argument types: ([Ljava.lang.String;, ConsoleScript40$_run_closure2_closure3) values: [[], [email protected]]
Possible solutions: collect(), collect(), collect(groovy.lang.Closure), collect(java.util.Collection, groovy.lang.Closure), collect(java.util.Collection, groovy.lang.Closure), collect(groovy.lang.Closure)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:55)
at org.codehaus.groovy.runtime.callsite.PojoMetaClassSite.call(PojoMetaClassSite.java:46)
..
...
中所提供的答案任何幫助嗎? –