I’ve never had any problems wrapping my head around the concept of until. And, I never particularly agreed with the language-purists who decried, say, the repeat .. until statement in Pascal. As long as you clearly understand how a particular language implements the concept, it’s a perfectly sensible idea that we use all the time: “get on the freeway and then keep driving until you get there.” “Jump rope until you get tired of jumping.” A programming language should easily support this very common notion. The people who correctly point out that it is can be equivalently expressed in terms of while are stating a theoretically-correct point, but not a pragmatic one. A language is a tool, built for me to get a ($$)job($$) done. I don’t have to turn my thinking upside-down ... that’s what compilers are for. It can “figure it out” well enough either way; therefore, it should.
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.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||