[−][src]Function envmnt::get_set
pub fn get_set(key: &str, value: &str) -> Option<String>
Sets the environment variable value and returns the previous value.
Arguments
key
- The environment variable namevalue
- The environment variable value
Example
extern crate envmnt; fn main() { let pre_value = envmnt::get_set("MY_ENV_VAR", "SOME VALUE"); let value = envmnt::get_or("MY_ENV_VAR", "DEFAULT_VALUE"); println!("New Env Value: {}", &value); println!("Previous Env Value: {:?}", &pre_value); }