I agree that my use of the word "global" in this context is suboptimal.

The classic example is a project I was on 20 odd years ago where the project leader had been told that using global variables (in C) was considered a no-no. So, his 'fix' to avoid globals was that instead of this:

// projdata.h int something; char filename[255]; ... // projlib.c #include "projdata.h" int somefunc() { ... strupr( filename ); ... return 0; } void someotherfunc ( int n ) { ... something = n; ... return; }

We had:

// projdata.h struct { int something; char filename[255]; ... } projdata, *pprojdata; // projlib.c #include "projdata.h" int somefunc( pprojdata p ) { ... strcat( p->filename, ... ); ... return 0; } void someotherfunc ( pprojdata p, int n ) { ... p->something = n; ... return; } // main.c int main ( ... ) projdata pd; int n; ... n = somefunc( &pd ); ... someotherfunc( &pd, n ); ... }

Everything was simply wrapped in a huge struct a pointer to which got passed to every subroutine in the project. That code may seem far-fetched, but beleive, it's like is not so far away even today.

He'd avoided using global variables, but still all the program state was "global" in scope, even though it actually resided on the stack and so was local (auto) to main.

Global is not the right term here, but I cannot think of a better term?


Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
The "good enough" maybe good enough for the now, and perfection maybe unobtainable, but that should not preclude us from striving for perfection, when time, circumstance or desire allow.

In reply to Re^6: Why are people not using POE? by BrowserUk
in thread Why are people not using POE? by johnnywang

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