boolean over multiple variables

[Simen kjaeraas]

On Fri, 22 Jan 2010 22:55:45 +0100, strtr <strtr at spam.com> wrote:

> This may be is a very basic question, but is there a way to let me omit  
> a repeating variable when doing multiple boolean operations?
>
> if ( var == a || var == b || var == c || var == d)
> if ( var == (a || b || c || d) )

bool anySame( T, U... )( T arg1, U args ) {
   foreach ( arg; args ) {
     if ( arg1 == arg ) {
       return true;
     }
   }
   return false;
}

bool allSame( T, U... )( T arg1, U args ) {
   foreach ( arg; args ) {
     if ( arg1 != arg ) {
       return false;
     }
   }
   return true;
}

Not tested, but they should work:

if ( anySame( var, a, b, c, d ) ) {
}

if ( allSame( var, a, b, c, d ) ) {
}

-- 
Simen