What is the ENV.member?() method in Ruby?
Overview
The member?() method of the ENV class in Ruby tells us if there is an environment variable with the given name. The name is passed as a parameter to the member?() method.
Syntax
ENV.member?(name)
Syntax for the member?() method
Parameters
This method takes the parameter, name, which represents the name of the environment variable for which we want to check.
Return value
It returns a boolean value. It returns true if an environment variable with such name exists. Otherwise, it returns false.
Example
# clear default environment variablesENV.clear# create some environment variablesENV["secret_name"] = "secret"ENV["secret_token"] = "123"ENV["private_key"] = "server123"ENV["foo"] = "1"ENV["bar"] = "0"# use the key() method in driver codeenv_name = ["secret_name", "secret", "secret_token", "bar"]for i in 0..3 doprint(env_name[i], ": " , ENV.member?(env_name[i]), "\n")end
Explanation
- Line 2: We clear all present environment variables.
- Line 5–9: We create some new environment variables.
- Line 14: We use the
member?(), along with somenameas parameters. We check if some variables exists. Next, we print the results.
TRENDING TOPICS
