如何比较R中相等性的环境 [英] how to compare environment for equality in R

问题描述

我想检查当前环境是否是R中的全局环境.但是，直接比较似乎不适用于环境.最好的方法是什么?

I would like to check if the current environment is the global environment in R. However, direct comparison doesn't seem to work with evironments. What is the best way to do this?

#doesn't work
sys.frame() == .GlobalEnv

推荐答案

Matthew Plourde的解决方案:

Matthew Plourde's solution:

> identical(sys.frame(),.GlobalEnv)
[1] TRUE

您也可以检查名称，尽管这可能不太可靠:

You can also check names, though this might be less reliable:

> environmentName(sys.frame())=="R_GlobalEnv"
[1] TRUE

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