Re: Iteration condition...

You might have use for the "flip-flop" operator .., documented in perlop under Range Operators:

for( @input ) {

    if( /$start/ .. /$finish/ ) {
        do_this();
    } else {
        do_that();
    }

}
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Re^2: Iteration condition... by kyle (Abbot) on Mar 31, 2008 at 15:10 UTC
The trouble with using the flip flop directly is that it's still true when `/$Finish/` matches, but the OP wants `$State` to be false when `/$Finish/` matches. To account for this, my solution says `( ( /$Start/ .. /$Finish/ ) && ! /$Finish/ )`. The inner parentheses are necessary because `&&` binds tighter than the flip flop. Without them, it means `( /$Start/ .. ( /$Finish/ && ! /$Finish/ ) )`, which is true at `/$Start/` and then never turns false.	[reply] [d/l] [select]
Re^3: Iteration condition... by rhesa (Vicar) on Mar 31, 2008 at 15:22 UTC
You're quite right. Gotta love boundary conditions ;-) As an alternative to the parentheses, you could replace `&&` with `and`, which has low enough precedence: `/$start/ .. /$finish/ and !/$finish/`.	[reply] [d/l] [select]