每个闭包的groovy多重赋值失败

Question

为什么这个groovy代码

def versionString = '10.15.20'
int major
int minor
int patch
(major, minor, patch) = versionString.split(/\./).each { Integer.parseInt(it) }
println "$major.$minor.$patch"

抛出此异常

Caught: org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object '10' with class 'java.lang.String' to class 'int'
org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object '10' with class 'java.lang.String' to class 'int'

而不是显示10.15.20？

即。为什么变量用split（）的输出赋值而不是闭包的输出？

Answer 1

您需要collect

(major, minor, patch) = versionString.split(/\./).collect { Integer.parseInt(it) }