• brian (18/36) Oct 04 2016 Howdy folks
• Adam D. Ruppe (3/3) Oct 04 2016 I'd put your repeated variables together in a struct, then pass
• brian (8/11) Oct 04 2016 That's not a bad idea.

brian <brian infinityplusb.com> writes:

Howdy folks

This might be a really stupid question, but ya know, if you don't 
ask ...

So, anytime I am calling a function, I have to include everything 
that the function needs all the time. My simplistic example is:


import std.stdio;

void test(string firstinput, string secondinput)
{
    if(secondinput=="world")
        printoutput(firstinput, secondinput);
}

void printoutput(string thisIsJustGreeting, string secondinput)
{
    writeln(thisIsJustGreeting, " ", secondinput);
}

void main()
{
    string greeting = "hello";  // I really don't want to bring 
 this through every function
    string thisthing = "world";
    test(greeting, thisthing);
}

For this, I don't really want to keep bringing "greeting" around 
with me. Now, I know if I call `printoutput` from somewhere where 
that variable hasn't been declared it'll go nuts, but at the 
moment my code is ugly because I have to keep carrying variables 
around everywhere ...

But when I have a whole heap of things which are quasi-global I 
don't want to keep having to include the same things over and 
over again, especially functions within functions. For a tedious 
example:

Maybe my program design just needs rethinking (I'm not from a CS 
background, so I struggle with the easy stuff sometimes), but a 
simple/better way of doing this would really help. :)

TIA

Adam D. Ruppe <destructionator gmail.com> writes:

I'd put your repeated variables together in a struct, then pass 
it around to the functions. At least then you pass just one param 
at a time, without losing the info.

brian <brian infinityplusb.com> writes:

On Tuesday, 4 October 2016 at 13:16:35 UTC, Adam D. Ruppe wrote:
 I'd put your repeated variables together in a struct, then pass 
 it around to the functions. At least then you pass just one 
 param at a time, without losing the info.

That's not a bad idea.
I have been creating "ids" to point to my structs and passing 
that around where needed, but in places it's still getting ugly, 
as they are sometimes more complicated than single vars, but it 
does the trick.
I might just get it to work the ugly way, and try pretty it up 
later. :P