获取 groovy 映射中的密钥 [英] Get key in groovy maps

问题描述

def map = [name:"Gromit", likes:"cheese", id:1234]

我想以获取密钥的方式访问地图

I would like to access map in such a way that I can get the key

类似于输出的东西

map.keys 返回字符串数组.基本上我只想拿到钥匙

map.keys returns array of string. basically i just want to get the keys

输出:

name
likes
id

推荐答案

try map.keySet()

如果你想要一个数组:

map.keySet() as String[]; // thx @tim_yates

或者，更时髦:

map.each{
    key, value -> print key;
}

警告:在 Jenkins 中，这个 groovy-ish 示例被巧妙地破坏了，因为它依赖于迭代器.迭代器在 Jenkins Pipeline 代码中并不安全，除非包装在 @NonCPS 函数中.

Warning: In Jenkins, the groovy-ish example is subtly broken, as it depends on an iterator. Iterators aren't safe in Jenkins Pipeline code unless wrapped in a @NonCPS function.

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