Re^3: IF and GREP Question

"if ()" imposes a scalar context.

An array in a scalar context returns the number of elements.

If the array is empty, "if (@found)" sees undef or zero , which is FALSE in perl.

If the array has values, "if(@found)" sees a non-zero value, which is TRUE in perl.

My goal ... to kill off the slow brain cells that are holding me back from synergizing my knowledge of vertically integrated mobile platforms in local cloud-based content management system datafication.

Comment on Re^3: IF and GREP Question

Replies are listed 'Best First'.
Re^4: IF and GREP Question by jwkrahn (Abbot) on Sep 18, 2013 at 06:10 UTC
"if ()" imposes a scalar context. Actually it imposes a boolean context, which is basically the same as scalar context. "if (@found)" sees undef or zero An array in boolean context cannot be undef. In fact, defined doesn't work with arrays anymore.	[reply]