I agree with you here that ordered matching of sigs is convenient, even though it isn't as clear.
Standard ML guarantees ordered matching in functions (and also in lambdas and case expressions), so you can say this:
fun fact 0 = 1 |
fact n = n * fact(n - 1);
(this is not the best way to define factorial though).
Prolog also matches the heads of predicate definitions in order.
Mathematica is a bit different. It matches argument lists to more specific patterns first, and when it is not clear which pattern is more specific, it matches them in order.
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:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- 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.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||