Well, I cheated and ran the script to see what would happen.
But I will offer a guessed explanation.
The first script I ran was as is shown above. My output was:
"In the beginning there was , in the end there will be .
B: I believe the output was this way because when the subroutine
was called via the subroutine(); nothing was passed to the subroutine via the '()' thus there
were no valid local (to the subroutine) variables called
'_' therefore nothing being substituted in those slots.
C: On the other hand when you change the subroutine(); to &subroutine; it printed:
"In the beginning there was nothing, in the end there will be nothing.
The reason this occurred is because when calling a subroutine
with the '&' the sub automagically "sees" the global scalar
array named '_'.
I admit, lexical scope vs dynamic scope is still confusing to me and
arrays with scope are questionable by me too. I'd be
interested to know how close I am to being correct.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
Outside of code tags, you may need to use entities for some characters:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||