[−][src]Function envmnt::is
pub fn is<K: AsRef<OsStr>>(key: K) -> bool
Returns false if environment variable value if falsy. The value is falsy if it is one of the following:
- Empty string
- "false" (case insensitive)
- "no" (case insensitive)
- "0" Any other value is returned as true. This is same as calling is_or("varname", false)
Arguments
key
- The environment variable name
Example
extern crate envmnt; fn main() { envmnt::set_bool("FLAG_VAR", true); assert!(envmnt::is_equal("FLAG_VAR", "true")); let flag_value = envmnt::is("FLAG_VAR"); assert!(flag_value); }