[−][src]Function envmnt::decrement
pub fn decrement<K: AsRef<OsStr>>(key: K) -> isize
Decrements and returns the new value stored by the given environment variable key. In case the variable does not exist, it will decrement to -1. The updated value will be returned.
Arguments
key
- The environment variable name
Example
fn main() { envmnt::set_u8("ENV_VAR", 5); let value = envmnt::decrement("ENV_VAR"); assert_eq!(value, 4); }