Re: Setting default values for Main function's args Array

[Vaidas via Digitalmars-d-learn]

On Thursday, 27 June 2019 at 17:22:36 UTC, Paul Backus wrote:
On Thursday, 27 June 2019 at 17:20:37 UTC, Paul Backus wrote:
void main(string[] args)
{
    string[] defaultArgs = ["my", "default", "arguments"];
    if (args.length == 0) {
        args = defaultArgs;
    }
    // Process args...
}

Correction: you should check for `args.length == 1`, since (as 
Adam points out) the name of the program will be passed as 
args[0].

I'm feeling, that overwriting the zero argument that is 
containing the program's path is mostly never a good idea.

Here, zero argument will not be overwritten.

Program.d
import std.stdio : writeln;
void main(string[] args)
{
    string[] defaultArgs = [args[0], "default", "arguments"];
    if (args.length == 1) {
        args = defaultArgs;
    }
    // Process args...
    writeln("", args);
}

Output:

vaidas@vaidas-SATELLITE-L855:~/Desktop$ rdmd program.d
["/tmp/.rdmd-1000/rdmd-program.d-7E2D9881B29D67DB2D97D001FFD2817D/program", "default", 
"arguments"]