You can’t parse [X]HTML with regex. Because HTML can’t be parsed by regex. Regex is not a tool that can be used to correctly parse HTML. As I have answered in HTML-and-regex questions here so many times before, the use of regex will not allow you to consume HTML. Regular expressions are a tool that is insufficiently sophisticated to understand the constructs employed by HTML. HTML is not a regular language and hence cannot be parsed by regular expressions. Regex queries are not equipped to break down HTML into its meaningful parts. so many times but it is not getting to me. Even enhanced irregular regular expressions as used by Perl are not up to the task of parsing HTML. You will never make me crack. HTML is a language of sufficient complexity that it cannot be parsed by regular expressions. Even Jon Skeet cannot parse HTML using regular expressions. Every time you attempt to parse HTML with regular expressions, the unholy child weeps the blood of virgins, and Russian hackers pwn your webapp. Parsing HTML with regex summons tainted souls into the realm of the living. HTML and regex go together like love, marriage, and ritual infanticide. The cannot hold it is too late. The force of regex and HTML together in the same conceptual space will destroy your mind like so much watery putty. If you parse HTML with regex you are giving in to Them and their blasphemous ways which doom us all to inhuman toil for the One whose Name cannot be expressed in the Basic Multilingual Plane, he comes. HTML-plus-regexp will liquify the nerves of the sentient whilst you observe, your psyche withering in the onslaught of horror. Rege̿̔̉x-based HTML parsers are the cancer that is killing StackOverflow it is too late it is too late we cannot be saved the trangession of a chi͡ld ensures regex will consume all living tissue (except for HTML which it cannot, as previously prophesied) dear lord help us how can anyone survive this scourge using regex to parse HTML has doomed humanity to an eternity of dread torture and security holes using regex as a tool to process HTML establishes a breach between this world and the dread realm of c͒ͪo͛ͫrrupt entities (like SGML entities, but more corrupt) a mere glimpse of the world of regex parsers for HTML will instantly transport a programmer’s consciousness into a world of ceaseless screaming, he comes, the pestilent slithy regex-infection will devour your HTML parser…
Trovato qui non chiedetemi come.
Post correlati:
3 comments ↓
Perdona la pedanteria ma se il tipo avesse letto un po’ di Chomsky, sulle grammatiche e le classificazioni dei linguaggi, avrebbe avuto chiaro il problema senza sparpagliare tutte ste parole.
Le regexp consentono di modellare automi riconoscitori di livello inferiore a quelli consentiti dallo xhtml
da qui, per l’usuale teorema della cibernetica, la capacita’ di un sistema basato su regexp e’ inferiore a quello di uno xhtml.
Lo so sono un rompiballe.
Consiglio sallo scopo breve lettura del “Principi di programmazione dei compilatori” di David Gries, basta leggere l’intro dove da la gerarchia dei linguaggi.
@Mauro: intendi dire che le RegExp consentono un parsing di entità di dati più piccole rispetto alle entità di dati XHTML o che consentono un parsing di più basso livello?
Da quanto hai scritto è un po’ difficile capire il senso delle due frasi centrali
Beh dai però la sua versione è molto più divertente. In particolare “HTML and regex go together like love, marriage, and ritual infanticide” non è niente male