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Function std.process.environment.get
Retrieves the value of the environment variable with the given name
Unlike environment.opIndex, this function never throws.
auto sh = environment.get("SHELL", "/bin/sh");
This function is also useful in checking for the existence of an
environment variable.
auto myVar = environment.get("MYVAR");
if (myVar is null)
{
// Environment variable doesn't exist.
// Note that we have to use 'is' for the comparison, since
// myVar == null is also true if the variable exists but is
// empty.
}
Prototype
static string get( const(char[]) name, string defaultValue = null ) @safe;
Throws
std.utf.UTFException if the variable contains invalid UTF-16
characters (Windows only).
Authors
Lars Tandle Kyllingstad, Steven Schveighoffer, Vladimir Panteleev