Groovy对Object的增强

Groovy 对 Object进行了统一的增强，本例子具体关注一下。

 

def a = 1..10

println "any"
a.any { println it ; it >5 }

println "every"
a.every { println it ; it >5 }

println "each"
a.each { println it}

println "eachWithIndex"
a.eachWithIndex { v,index -> println v + " , " + index  }

println "find"
a.find { println it ; it >5 }

println "inject" 
//特别适合求和等累积运算
println a.inject ( 0 ,{ value, item -> println value + "  ,  " + item ; value + item})

println "collect" 
//处理后添加到集合后面
println ( ["E","F"].collect (["B","C","D"], { println it ; it +"a" }) )
println (["E","F"].collect { println it ; it +"a" } )

println "invokeMethod" 
println a.invokeMethod("size",null)

println "is" // ==
println "A".is ("A" )

println "dump" 
println "A".dump()

println "identity" 
[1,2,3].identity { 
 println it
 println  size ()
}

println "with" 
[1,2,3].with{ 
 println it
 println  size()
}

println "use"

class  B {
 static def msg (String msg) { println msg }
 static def length (v){ v.size()}
}

use(B){
 "hello".msg()
 println a.length()
}